#645E71
Slate Gray · medium cool gray
About #645E71
#645E71 is a medium, muted gray colour. Digitally that works out to 39% red, 37% green and 44% blue. In CMYK print terms it is 12% cyan, 17% magenta, 0% yellow and 56% black. Most people will perceive it as cool.
Visually it is similar to Slate Gray (ΔE 14.6), with Eggplant the next nearest named colour. Across the colour wheel sits #6B715E (gray), its complementary partner.
Because it is medium, it is most useful for illustrations, icons and secondary elements. Put white text on top of it — 6.21:1, a WCAG AA pass. Used as a text colour on white, it is readable too (6.21:1).
Colour codes
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Closest named colours
ΔE measures visible difference: under 2 is barely noticeable, over 10 is clearly different.
Text on #645E71
WCAG contrast for white and black text on this colour.
Colour-blindness preview
How #645E71 appears to people with the three most common types of colour-vision deficiency.
Shades, tints & matching colours
Similar colours
Frequently asked questions
›What colour is #645E71?
#645E71 is a medium, muted gray colour. Digitally that works out to 39% red, 37% green and 44% blue. In CMYK print terms it is 12% cyan, 17% magenta, 0% yellow and 56% black. Most people will perceive it as cool.
›What text colour should I use on #645E71?
Use white text. White on #645E71 has a contrast ratio of 6.21:1 (AA).
›What colours go with #645E71?
Its complementary colour is #6B715E, and analogous partners are #5E6171 and #6E5E71.