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index.ts
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index.ts
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import type { Faker } from '../../faker';
/**
* Color space names supported by CSS.
*/
export const CSS_SPACES = [
'sRGB',
'display-p3',
'rec2020',
'a98-rgb',
'prophoto-rgb',
'rec2020',
] as const;
/**
* Functions supported by CSS to produce color.
*/
export const CSS_FUNCTIONS = [
'rgb',
'rgba',
'hsl',
'hsla',
'hwb',
'cmyk',
'lab',
'lch',
'color',
] as const;
export type CSSFunction = (typeof CSS_FUNCTIONS)[number];
export type CSSSpace = (typeof CSS_SPACES)[number];
export type StringColorFormat = 'css' | 'binary';
export type NumberColorFormat = 'decimal';
export type ColorFormat = StringColorFormat | NumberColorFormat;
export type Casing = 'lower' | 'upper' | 'mixed';
/**
* Formats the hex format of a generated color string according
* to options specified by user.
*
* @param hexColor Hex color string to be formatted.
* @param options Options object.
* @param options.prefix Prefix of the generated hex color. Defaults to `'0x'`.
* @param options.casing Letter type case of the generated hex color. Defaults to `'mixed'`.
*/
function formatHexColor(
hexColor: string,
options?: {
prefix?: string;
casing?: Casing;
}
): string {
switch (options?.casing) {
case 'upper':
hexColor = hexColor.toUpperCase();
break;
case 'lower':
hexColor = hexColor.toLowerCase();
break;
}
if (options?.prefix) {
hexColor = options.prefix + hexColor;
}
return hexColor;
}
/**
* Converts an array of numbers into binary string format.
*
* @param values Array of values to be converted.
*/
function toBinary(values: number[]): string {
const binary: string[] = values.map((value) => {
const isFloat = value % 1 !== 0;
if (isFloat) {
const buffer = new ArrayBuffer(4);
new DataView(buffer).setFloat32(0, value);
const bytes = new Uint8Array(buffer);
return toBinary(Array.from(bytes)).split(' ').join('');
}
return (value >>> 0).toString(2).padStart(8, '0');
});
return binary.join(' ');
}
/**
* Converts an array of numbers into CSS accepted format.
*
* @param values Array of values to be converted.
* @param cssFunction CSS function to be generated for the color. Defaults to `'rgb'`.
* @param space Color space to format CSS color function with. Defaults to `'sRGB'`.
*/
function toCSS(
values: number[],
cssFunction: CSSFunction = 'rgb',
space: CSSSpace = 'sRGB'
): string {
const percentage = (value: number) => Math.round(value * 100);
switch (cssFunction) {
case 'rgba':
return `rgba(${values[0]}, ${values[1]}, ${values[2]}, ${values[3]})`;
case 'color':
return `color(${space} ${values[0]} ${values[1]} ${values[2]})`;
case 'cmyk':
return `cmyk(${percentage(values[0])}%, ${percentage(
values[1]
)}%, ${percentage(values[2])}%, ${percentage(values[3])}%)`;
case 'hsl':
return `hsl(${values[0]}deg ${percentage(values[1])}% ${percentage(
values[2]
)}%)`;
case 'hsla':
return `hsl(${values[0]}deg ${percentage(values[1])}% ${percentage(
values[2]
)}% / ${percentage(values[3])})`;
case 'hwb':
return `hwb(${values[0]} ${percentage(values[1])}% ${percentage(
values[2]
)}%)`;
case 'lab':
return `lab(${percentage(values[0])}% ${values[1]} ${values[2]})`;
case 'lch':
return `lch(${percentage(values[0])}% ${values[1]} ${values[2]})`;
case 'rgb':
default:
return `rgb(${values[0]}, ${values[1]}, ${values[2]})`;
}
}
/**
* Converts an array of color values to the specified color format.
*
* @param values Array of color values to be converted.
* @param format Format of generated RGB color.
* @param cssFunction CSS function to be generated for the color. Defaults to `'rgb'`.
* @param space Color space to format CSS color function with. Defaults to `'sRGB'`.
*/
function toColorFormat(
values: number[],
format: ColorFormat,
cssFunction: CSSFunction = 'rgb',
space: CSSSpace = 'sRGB'
): string | number[] {
switch (format) {
case 'css':
return toCSS(values, cssFunction, space);
case 'binary':
return toBinary(values);
default:
return values;
}
}
/**
* Module to generate colors.
*/
export class ColorModule {
constructor(private readonly faker: Faker) {
// Bind `this` so namespaced is working correctly
for (const name of Object.getOwnPropertyNames(ColorModule.prototype)) {
if (name === 'constructor' || typeof this[name] !== 'function') {
continue;
}
this[name] = this[name].bind(this);
}
}
/**
* Returns a random human readable color name.
*
* @example
* faker.color.human() // 'red'
*
* @since 7.0.0
*/
human(): string {
return this.faker.helpers.arrayElement(this.faker.definitions.color.human);
}
/**
* Returns a random color space name from the worldwide accepted color spaces.
* Source: https://en.wikipedia.org/wiki/List_of_color_spaces_and_their_uses
*
* @example
* faker.color.space() // 'sRGB'
*
* @since 7.0.0
*/
space(): string {
return this.faker.helpers.arrayElement(this.faker.definitions.color.space);
}
/**
* Returns a random css supported color function name.
*
* @example
* faker.color.cssSupportedFunction() // 'rgb'
*
* @since 7.0.0
*/
cssSupportedFunction(): string {
return this.faker.helpers.arrayElement(CSS_FUNCTIONS);
}
/**
* Returns a random css supported color space name.
*
* @example
* faker.color.cssSupportedSpace() // 'display-p3'
*
* @since 7.0.0
*/
cssSupportedSpace(): string {
return this.faker.helpers.arrayElement(CSS_SPACES);
}
/**
* Returns an RGB color.
*
* @example
* faker.color.rgb() // '0xffffFF'
*
* @since 7.0.0
*/
rgb(): string;
/**
* Returns an RGB color.
*
* @param options Options object.
* @param options.prefix Prefix of the generated hex color. Only applied when 'hex' format is used. Defaults to `'0x'`.
* @param options.casing Letter type case of the generated hex color. Only applied when `'hex'` format is used. Defaults to `'mixed'`.
* @param options.format Format of generated RGB color. Defaults to `hex`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.rgb() // '0xffffFF'
* faker.color.rgb({ prefix: '#' }) // '#ffffFF'
* faker.color.rgb({ casing: 'upper' }) // '0xFFFFFF'
* faker.color.rgb({ casing: 'lower' }) // '0xffffff'
* faker.color.rgb({ prefix: '#', casing: 'lower' }) // '#ffffff'
* faker.color.rgb({ format: 'hex', casing: 'lower' }) // '#ffffff'
* faker.color.rgb({ format: 'css' }) // 'rgb(255, 0, 0)'
* faker.color.rgb({ format: 'binary' }) // '10000000 00000000 11111111'
*
* @since 7.0.0
*/
rgb(options?: {
prefix?: string;
casing?: Casing;
format?: 'hex' | StringColorFormat;
includeAlpha?: boolean;
}): string;
/**
* Returns an RGB color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'hex'`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.rgb() // '0xffffFF'
* faker.color.rgb({ format: 'decimal' }) // [255, 255, 255]
* faker.color.rgb({ format: 'decimal', includeAlpha: true }) // [255, 255, 255, 0.4]
*
* @since 7.0.0
*/
rgb(options?: {
format?: NumberColorFormat;
includeAlpha?: boolean;
}): number[];
/**
* Returns an RGB color.
*
* @param options Options object.
* @param options.prefix Prefix of the generated hex color. Only applied when `'hex'` format is used. Defaults to `'0x'`.
* @param options.casing Letter type case of the generated hex color. Only applied when `'hex'` format is used. Defaults to `'mixed'`.
* @param options.format Format of generated RGB color. Defaults to `'hex'`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.rgb() // '0xffffFF'
* faker.color.rgb({ prefix: '#' }) // '#ffffFF'
* faker.color.rgb({ casing: 'upper' }) // '0xFFFFFF'
* faker.color.rgb({ casing: 'lower' }) // '0xffffff'
* faker.color.rgb({ prefix: '#', casing: 'lower' }) // '#ffffff'
* faker.color.rgb({ format: 'hex', casing: 'lower' }) // '#ffffff'
* faker.color.rgb({ format: 'decimal' }) // [255, 255, 255]
* faker.color.rgb({ format: 'css' }) // 'rgb(255, 0, 0)'
* faker.color.rgb({ format: 'binary' }) // '10000000 00000000 11111111'
* faker.color.rgb({ format: 'decimal', includeAlpha: true }) // [255, 255, 255, 0.4]
*
* @since 7.0.0
*/
rgb(options?: {
prefix?: string;
casing?: Casing;
format?: 'hex' | ColorFormat;
includeAlpha?: boolean;
}): string | number[];
rgb(options?: {
prefix?: string;
casing?: Casing;
format?: 'hex' | ColorFormat;
includeAlpha?: boolean;
}): string | number[] {
const {
format = 'hex',
includeAlpha = false,
prefix = '#',
casing = 'lower',
} = options || {};
options = { format, includeAlpha, prefix, casing };
let color: string | number[];
let cssFunction: CSSFunction = 'rgb';
if (format === 'hex') {
color = this.faker.string.hexadecimal({
length: includeAlpha ? 8 : 6,
prefix: '',
});
color = formatHexColor(color, options);
return color;
}
color = Array.from({ length: 3 }, () => this.faker.number.int(255));
if (includeAlpha) {
color.push(this.faker.number.float());
cssFunction = 'rgba';
}
return toColorFormat(color, format, cssFunction);
}
/**
* Returns a CMYK color.
*
* @example
* faker.color.cmyk() // [0.31, 0.52, 0.32, 0.43]
*
* @since 7.0.0
*/
cmyk(): number[];
/**
* Returns a CMYK color.
*
* @param options Options object.
* @param options.format Format of generated CMYK color. Defaults to `'decimal'`.
*
* @example
* faker.color.cmyk() // [0.31, 0.52, 0.32, 0.43]
* faker.color.cmyk({ format: 'css' }) // cmyk(100%, 0%, 0%, 0%)
* faker.color.cmyk({ format: 'binary' }) // (8-32 bits) x 4
*
* @since 7.0.0
*/
cmyk(options?: { format?: StringColorFormat }): string;
/**
* Returns a CMYK color.
*
* @param options Options object.
* @param options.format Format of generated CMYK color. Defaults to `'decimal'`.
*
* @example
* faker.color.cmyk() // [0.31, 0.52, 0.32, 0.43]
* faker.color.cmyk({ format: 'decimal' }) // [0.31, 0.52, 0.32, 0.43]
*
* @since 7.0.0
*/
cmyk(options?: { format?: NumberColorFormat }): number[];
/**
* Returns a CMYK color.
*
* @param options Options object.
* @param options.format Format of generated CMYK color. Defaults to `'decimal'`.
*
* @example
* faker.color.cmyk() // [0.31, 0.52, 0.32, 0.43]
* faker.color.cmyk({ format: 'decimal' }) // [0.31, 0.52, 0.32, 0.43]
* faker.color.cmyk({ format: 'css' }) // cmyk(100%, 0%, 0%, 0%)
* faker.color.cmyk({ format: 'binary' }) // (8-32 bits) x 4
*
* @since 7.0.0
*/
cmyk(options?: { format?: ColorFormat }): string | number[];
cmyk(options?: { format?: ColorFormat }): string | number[] {
const color: string | number[] = Array.from({ length: 4 }, () =>
this.faker.number.float()
);
return toColorFormat(color, options?.format || 'decimal', 'cmyk');
}
/**
* Returns an HSL color.
*
* @example
* faker.color.hsl() // [201, 0.23, 0.32]
*
* @since 7.0.0
*/
hsl(): number[];
/**
* Returns an HSL color.
*
* @param options Options object.
* @param options.format Format of generated HSL color. Defaults to `'decimal'`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.hsl() // [201, 0.23, 0.32]
* faker.color.hsl({ format: 'css' }) // hsl(0deg, 100%, 80%)
* faker.color.hsl({ format: 'css', includeAlpha: true }) // hsl(0deg 100% 50% / 0.5)
* faker.color.hsl({ format: 'binary' }) // (8-32 bits) x 3
* faker.color.hsl({ format: 'binary', includeAlpha: true }) // (8-32 bits) x 4
*
* @since 7.0.0
*/
hsl(options?: { format?: StringColorFormat; includeAlpha?: boolean }): string;
/**
* Returns an HSL color.
*
* @param options Options object.
* @param options.format Format of generated HSL color. Defaults to `'decimal'`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.hsl() // [201, 0.23, 0.32]
* faker.color.hsl({ format: 'decimal' }) // [300, 0.21, 0.52]
* faker.color.hsl({ format: 'decimal', includeAlpha: true }) // [300, 0.21, 0.52, 0.28]
*
* @since 7.0.0
*/
hsl(options?: {
format?: NumberColorFormat;
includeAlpha?: boolean;
}): number[];
/**
* Returns an HSL color.
*
* @param options Options object.
* @param options.format Format of generated HSL color. Defaults to `'decimal'`.
* @param options.includeAlpha Adds an alpha value to the color (RGBA). Defaults to `false`.
*
* @example
* faker.color.hsl() // [201, 0.23, 0.32]
* faker.color.hsl({ format: 'decimal' }) // [300, 0.21, 0.52]
* faker.color.hsl({ format: 'decimal', includeAlpha: true }) // [300, 0.21, 0.52, 0.28]
* faker.color.hsl({ format: 'css' }) // hsl(0deg, 100%, 80%)
* faker.color.hsl({ format: 'css', includeAlpha: true }) // hsl(0deg 100% 50% / 0.5)
* faker.color.hsl({ format: 'binary' }) // (8-32 bits) x 3
* faker.color.hsl({ format: 'binary', includeAlpha: true }) // (8-32 bits) x 4
*
* @since 7.0.0
*/
hsl(options?: {
format?: ColorFormat;
includeAlpha?: boolean;
}): string | number[];
hsl(options?: {
format?: ColorFormat;
includeAlpha?: boolean;
}): string | number[] {
const hsl: number[] = [this.faker.number.int(360)];
for (let i = 0; i < (options?.includeAlpha ? 3 : 2); i++) {
hsl.push(this.faker.number.float());
}
return toColorFormat(
hsl,
options?.format || 'decimal',
options?.includeAlpha ? 'hsla' : 'hsl'
);
}
/**
* Returns an HWB color.
*
* @example
* faker.color.hwb() // [201, 0.21, 0.31]
*
* @since 7.0.0
*/
hwb(): number[];
/**
* Returns an HWB color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.hwb() // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'css' }) // hwb(194 0% 0%)
* faker.color.hwb({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
hwb(options?: { format?: StringColorFormat }): string;
/**
* Returns an HWB color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.hwb() // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'decimal' }) // [201, 0.21, 0.31]
*
* @since 7.0.0
*/
hwb(options?: { format?: NumberColorFormat }): number[];
/**
* Returns an HWB color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.hwb() // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'decimal' }) // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'css' }) // hwb(194 0% 0%)
* faker.color.hwb({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
hwb(options?: { format?: ColorFormat }): string | number[];
/**
* Returns an HWB color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.hwb() // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'decimal' }) // [201, 0.21, 0.31]
* faker.color.hwb({ format: 'css' }) // hwb(194 0% 0%)
* faker.color.hwb({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
hwb(options?: { format?: ColorFormat }): string | number[] {
const hsl: number[] = [this.faker.number.int(360)];
for (let i = 0; i < 2; i++) {
hsl.push(this.faker.number.float());
}
return toColorFormat(hsl, options?.format || 'decimal', 'hwb');
}
/**
* Returns a LAB (CIELAB) color.
*
* @example
* faker.color.lab() // [0.832133, -80.3245, 100.1234]
*
* @since 7.0.0
*/
lab(): number[];
/**
* Returns a LAB (CIELAB) color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lab() // [0.832133, -80.3245, 100.1234]
* faker.color.lab({ format: 'css' }) // lab(29.2345% 39.3825 20.0664)
* faker.color.lab({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
lab(options?: { format?: StringColorFormat }): string;
/**
* Returns a LAB (CIELAB) color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lab() // [0.832133, -80.3245, 100.1234]
* faker.color.lab({ format: 'decimal' }) // [0.856773, -80.2345, 100.2341]
*
* @since 7.0.0
*/
lab(options?: { format?: NumberColorFormat }): number[];
/**
* Returns a LAB (CIELAB) color.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lab() // [0.832133, -80.3245, 100.1234]
* faker.color.lab({ format: 'decimal' }) // [0.856773, -80.2345, 100.2341]
* faker.color.lab({ format: 'css' }) // lab(29.2345% 39.3825 20.0664)
* faker.color.lab({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
lab(options?: { format?: ColorFormat }): string | number[];
lab(options?: { format?: ColorFormat }): string | number[] {
const lab = [this.faker.number.float({ precision: 0.000001 })];
for (let i = 0; i < 2; i++) {
lab.push(
this.faker.number.float({ min: -100, max: 100, precision: 0.0001 })
);
}
return toColorFormat(lab, options?.format || 'decimal', 'lab');
}
/**
* Returns an LCH color. Even though upper bound of
* chroma in LCH color space is theoretically unbounded,
* it is bounded to 230 as anything above will not
* make a noticeable difference in the browser.
*
* @example
* faker.color.lch() // [0.522345, 72.2, 56.2]
*
* @since 7.0.0
*/
lch(): number[];
/**
* Returns an LCH color. Even though upper bound of
* chroma in LCH color space is theoretically unbounded,
* it is bounded to 230 as anything above will not
* make a noticeable difference in the browser.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lch() // [0.522345, 72.2, 56.2]
* faker.color.lch({ format: 'css' }) // lch(52.2345% 72.2 56.2)
* faker.color.lch({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
lch(options?: { format?: StringColorFormat }): string;
/**
* Returns an LCH color. Even though upper bound of
* chroma in LCH color space is theoretically unbounded,
* it is bounded to 230 as anything above will not
* make a noticeable difference in the browser.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lch() // [0.522345, 72.2, 56.2]
* faker.color.lch({ format: 'decimal' }) // [0.522345, 72.2, 56.2]
*
* @since 7.0.0
*/
lch(options?: { format?: NumberColorFormat }): number[];
/**
* Returns an LCH color. Even though upper bound of
* chroma in LCH color space is theoretically unbounded,
* it is bounded to 230 as anything above will not
* make a noticeable difference in the browser.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
*
* @example
* faker.color.lch() // [0.522345, 72.2, 56.2]
* faker.color.lch({ format: 'decimal' }) // [0.522345, 72.2, 56.2]
* faker.color.lch({ format: 'css' }) // lch(52.2345% 72.2 56.2)
* faker.color.lch({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
lch(options?: { format?: ColorFormat }): string | number[];
lch(options?: { format?: ColorFormat }): string | number[] {
const lch = [this.faker.number.float({ precision: 0.000001 })];
for (let i = 0; i < 2; i++) {
lch.push(this.faker.number.float({ max: 230, precision: 0.1 }));
}
return toColorFormat(lch, options?.format || 'decimal', 'lch');
}
/**
* Returns a random color based on CSS color space specified.
*
* @example
* faker.color.colorByCSSColorSpace() // [0.93, 1, 0.82]
*
* @since 7.0.0
*/
colorByCSSColorSpace(): number[];
/**
* Returns a random color based on CSS color space specified.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
* @param options.space Color space to generate the color for. Defaults to `'sRGB'`.
*
* @example
* faker.color.colorByCSSColorSpace() // [0.93, 1, 0.82]
* faker.color.colorByCSSColorSpace({ format: 'css', space: 'display-p3' }) // color(display-p3 0.12 1 0.23)
* faker.color.colorByCSSColorSpace({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
colorByCSSColorSpace(options?: {
format?: StringColorFormat;
space?: CSSSpace;
}): string;
/**
* Returns a random color based on CSS color space specified.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
* @param options.space Color space to generate the color for. Defaults to `'sRGB'`.
*
* @example
* faker.color.colorByCSSColorSpace() // [0.93, 1, 0.82]
* faker.color.colorByCSSColorSpace({ format: 'decimal' }) // [0.12, 0.21, 0.31]
*
* @since 7.0.0
*/
colorByCSSColorSpace(options?: {
format?: NumberColorFormat;
space?: CSSSpace;
}): number[];
/**
* Returns a random color based on CSS color space specified.
*
* @param options Options object.
* @param options.format Format of generated RGB color. Defaults to `'decimal'`.
* @param options.space Color space to generate the color for. Defaults to `'sRGB'`.
*
* @example
* faker.color.colorByCSSColorSpace() // [0.93, 1, 0.82]
* faker.color.colorByCSSColorSpace({ format: 'decimal' }) // [0.12, 0.21, 0.31]
* faker.color.colorByCSSColorSpace({ format: 'css', space: 'display-p3' }) // color(display-p3 0.12 1 0.23)
* faker.color.colorByCSSColorSpace({ format: 'binary' }) // (8-32 bits x 3)
*
* @since 7.0.0
*/
colorByCSSColorSpace(options?: {
format?: ColorFormat;
space?: CSSSpace;
}): string | number[];
colorByCSSColorSpace(options?: {
format?: ColorFormat;
space?: CSSSpace;
}): string | number[] {
if (options?.format === 'css' && !options?.space) {
options = { ...options, space: 'sRGB' };
}
const color = Array.from({ length: 3 }, () =>
this.faker.number.float({ precision: 0.0001 })
);
return toColorFormat(
color,
options?.format || 'decimal',
'color',
options?.space
);
}
}