Add LLVM icon (#1936)

[phatbhoy67]

Issue: #1936

Checklist

• I updated the JSON data in _data/simple-icons.json
• I optimized the icon with SVGO or SVGOMG
• The SVG viewbox is 0 0 24 24

Description

Manual vector silhouette of the wyvern (type of dragon) in the official logo .png.

Official source .ai converted to .svg.

The logo mainly #252c38 and many grey silvers including #c9ced4.

Hex value chosen, #252C38, is from the dragon wings in the full logo.

Hex value the color of the text in this derivative image: (https://llvm.org/img/LLVM-Logo-Derivative-5.png)

Built on Gitpod, working as expected.

[h1nk]

I'm not too sure about the color. Because the wings are a gradient, perhaps #262D3A would be better. It's taken from the color of the text in this and this image, or maybe instead #556293 which was taken from this and this.

I'd say probably the darker one (#262D3A) though because it's closer to the average gradient color of the wings in the main logo.

[h1nk]

Also, it might be better to make the silhouette paths based off of the official Illustrator file rather than doing it manually from the raster image.

[phatbhoy67]

I'm not too sure about the color.

Hey @hink the diff in rgb values between the colour you picked and the one I chose from the gradient are approx ±1 on each channel 👀 Spooky 👻
#252C38
#262D3A
I'll be honest, I can't really tell them apart visually. Happy to update the PR all the same 😸

[h1nk]

the diff in rgb values between the colour you picked and the one I chose from the gradient are approx ±1 on each channel

Haha, I only noticed the last channel was different.

Happy to update the PR all the same

Yeah, I think updating the color to the one pulled from the text and taking the silhouette path from the official vector instead of manual rasterization would be best.

[phatbhoy67]

updating the color to the one pulled from the text

🎉 Done

[birjj]

👍 Thanks for your work on this @phatbhoy67, and your reviewing of it @h1nk!