#666643
Umber · medium warm yellow
About #666643
#666643 is a medium, muted yellow colour. Digitally that works out to 40% red, 40% green and 26% blue. In CMYK print terms it is 0% cyan, 0% magenta, 34% yellow and 60% black. Most people will perceive it as warm.
Visually it is somewhere between Umber and Coffee (ΔE 17.5), with Coffee the next nearest named colour. Across the colour wheel sits #434366 (prussian blue), its complementary partner.
Because it is medium, it is most useful for illustrations, icons and secondary elements. Put white text on top of it — 5.92:1, a WCAG AA pass. Used as a text colour on white, it is readable too (5.92:1).
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 #666643
WCAG contrast for white and black text on this colour.
Colour-blindness preview
How #666643 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 #666643?
#666643 is a medium, muted yellow colour. Digitally that works out to 40% red, 40% green and 26% blue. In CMYK print terms it is 0% cyan, 0% magenta, 34% yellow and 60% black. Most people will perceive it as warm.
›What text colour should I use on #666643?
Use white text. White on #666643 has a contrast ratio of 5.92:1 (AA).
›What colours go with #666643?
Its complementary colour is #434366, and analogous partners are #665543 and #556643.