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Shades of gray - Wikipedia
Simple Gray Color Scheme » Gray »
228 Shades of Gray Color (Names, HEX, RGB, & CMYK Codes) – CreativeBooster
Colors Shades - Asp, PDF, Grey
CSS Color Module Level 4
British Standard BS 2660 BS 9-095 - Minerva grey / #b7b4ad Hex
Go Gray Color Scheme » Blue »
algorithm - How to get rough boundaries to classify colors into named colors? - Stack Overflow
RGB Color Chart, PDF, Artistic Techniques
British Standard BS381 676 - Light weatherwork grey / #9ea9ad Hex Color Code, RGB and Paints
Shades of Dark Gray #A9A9A9 hex color
Tints X11 color Dark Gray #A9A9A9 hex Hex color palette, Hex colors, X11 color
List of colors
d3d3d3 : Light gray Color Code, Names, Harmonies