diff --git a/atom/browser/api/atom_api_system_preferences_mac.mm b/atom/browser/api/atom_api_system_preferences_mac.mm
index 4b00710b77f1c..783171731249c 100644
--- a/atom/browser/api/atom_api_system_preferences_mac.mm
+++ b/atom/browser/api/atom_api_system_preferences_mac.mm
@@ -16,6 +16,7 @@
 
 #include "atom/browser/mac/atom_application.h"
 #include "atom/browser/mac/dict_util.h"
+#include "atom/browser/ui/cocoa/NSColor+Hex.h"
 #include "atom/common/native_mate_converters/gurl_converter.h"
 #include "atom/common/native_mate_converters/value_converter.h"
 #include "base/mac/scoped_cftyperef.h"
@@ -114,21 +115,6 @@ AVMediaType ParseMediaType(const std::string& media_type) {
   }
 }
 
-// Convert color to RGBA value like "aabbccdd"
-std::string ToRGBA(NSColor* color) {
-  return base::StringPrintf(
-      "%02X%02X%02X%02X", (int)(color.redComponent * 0xFF),
-      (int)(color.greenComponent * 0xFF), (int)(color.blueComponent * 0xFF),
-      (int)(color.alphaComponent * 0xFF));
-}
-
-// Convert color to RGB hex value like "#ABCDEF"
-std::string ToRGBHex(NSColor* color) {
-  return base::StringPrintf("#%02X%02X%02X", (int)(color.redComponent * 0xFF),
-                            (int)(color.greenComponent * 0xFF),
-                            (int)(color.blueComponent * 0xFF));
-}
-
 }  // namespace
 
 void SystemPreferences::PostNotification(const std::string& name,
@@ -408,7 +394,7 @@ AVMediaType ParseMediaType(const std::string& media_type) {
   if (@available(macOS 10.14, *))
     sysColor = [NSColor controlAccentColor];
 
-  return ToRGBA(sysColor);
+  return base::SysNSStringToUTF8([sysColor RGBAValue]);
 }
 
 std::string SystemPreferences::GetSystemColor(const std::string& color,
@@ -437,7 +423,7 @@ AVMediaType ParseMediaType(const std::string& media_type) {
     return "";
   }
 
-  return ToRGBHex(sysColor);
+  return base::SysNSStringToUTF8([sysColor hexadecimalValue]);
 }
 
 bool SystemPreferences::CanPromptTouchID() {
@@ -590,7 +576,7 @@ AVMediaType ParseMediaType(const std::string& media_type) {
     return "";
   }
 
-  return ToRGBHex(sysColor);
+  return base::SysNSStringToUTF8([sysColor hexadecimalValue]);
 }
 
 std::string SystemPreferences::GetMediaAccessStatus(
diff --git a/atom/browser/ui/cocoa/NSColor+Hex.h b/atom/browser/ui/cocoa/NSColor+Hex.h
index 3584f034e0890..bf9b59fb90169 100644
--- a/atom/browser/ui/cocoa/NSColor+Hex.h
+++ b/atom/browser/ui/cocoa/NSColor+Hex.h
@@ -10,6 +10,7 @@
 #import <Cocoa/Cocoa.h>
 
 @interface NSColor (Hex)
+- (NSString*)hexadecimalValue;
 + (NSColor*)colorWithHexColorString:(NSString*)hex;
 @end
 
diff --git a/atom/browser/ui/cocoa/NSColor+Hex.mm b/atom/browser/ui/cocoa/NSColor+Hex.mm
index 6dd63fa386a69..90e94fade7f5f 100644
--- a/atom/browser/ui/cocoa/NSColor+Hex.mm
+++ b/atom/browser/ui/cocoa/NSColor+Hex.mm
@@ -8,6 +8,66 @@
 
 @implementation NSColor (Hex)
 
+- (NSString*)RGBAValue {
+  double redFloatValue, greenFloatValue, blueFloatValue, alphaFloatValue;
+  int redIntValue, greenIntValue, blueIntValue, alphaIntValue;
+  NSString *redHexValue, *greenHexValue, *blueHexValue, *alphaHexValue;
+
+  NSColor* convertedColor =
+      [self colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
+
+  if (convertedColor) {
+    [convertedColor getRed:&redFloatValue
+                     green:&greenFloatValue
+                      blue:&blueFloatValue
+                     alpha:&alphaFloatValue];
+
+    redIntValue = redFloatValue * 255.99999f;
+    greenIntValue = greenFloatValue * 255.99999f;
+    blueIntValue = blueFloatValue * 255.99999f;
+    alphaIntValue = alphaFloatValue * 255.99999f;
+
+    redHexValue = [NSString stringWithFormat:@"%02x", redIntValue];
+    greenHexValue = [NSString stringWithFormat:@"%02x", greenIntValue];
+    blueHexValue = [NSString stringWithFormat:@"%02x", blueIntValue];
+    alphaHexValue = [NSString stringWithFormat:@"%02x", alphaIntValue];
+
+    return [NSString stringWithFormat:@"%@%@%@%@", redHexValue, greenHexValue,
+                                      blueHexValue, alphaHexValue];
+  }
+
+  return nil;
+}
+
+- (NSString*)hexadecimalValue {
+  double redFloatValue, greenFloatValue, blueFloatValue;
+  int redIntValue, greenIntValue, blueIntValue;
+  NSString *redHexValue, *greenHexValue, *blueHexValue;
+
+  NSColor* convertedColor =
+      [self colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
+
+  if (convertedColor) {
+    [convertedColor getRed:&redFloatValue
+                     green:&greenFloatValue
+                      blue:&blueFloatValue
+                     alpha:NULL];
+
+    redIntValue = redFloatValue * 255.99999f;
+    greenIntValue = greenFloatValue * 255.99999f;
+    blueIntValue = blueFloatValue * 255.99999f;
+
+    redHexValue = [NSString stringWithFormat:@"%02x", redIntValue];
+    greenHexValue = [NSString stringWithFormat:@"%02x", greenIntValue];
+    blueHexValue = [NSString stringWithFormat:@"%02x", blueIntValue];
+
+    return [NSString
+        stringWithFormat:@"#%@%@%@", redHexValue, greenHexValue, blueHexValue];
+  }
+
+  return nil;
+}
+
 + (NSColor*)colorWithHexColorString:(NSString*)inColorString {
   unsigned colorCode = 0;
   unsigned char redByte, greenByte, blueByte;