#666EB3
Denim · medium cool blue
About #666EB3
#666EB3 is a medium, moderately saturated blue colour. Digitally that works out to 40% red, 43% green and 70% blue. In CMYK print terms it is 43% cyan, 39% magenta, 0% yellow and 30% black. Most people will perceive it as cool.
Visually it is somewhere between Denim and Cornflower (ΔE 18.6), with Cornflower the next nearest named colour. Across the colour wheel sits #B3AB66 (matcha), its complementary partner.
Because it is medium, it is most useful for illustrations, icons and secondary elements. Put white text on top of it — 4.72:1, a WCAG AA pass. Used as a text colour on white, it is readable too (4.72:1).
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 #666EB3
WCAG contrast for white and black text on this colour.
Colour-blindness preview
How #666EB3 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 #666EB3?
#666EB3 is a medium, moderately saturated blue colour. Digitally that works out to 40% red, 43% green and 70% blue. In CMYK print terms it is 43% cyan, 39% magenta, 0% yellow and 30% black. Most people will perceive it as cool.
›What text colour should I use on #666EB3?
Use white text. White on #666EB3 has a contrast ratio of 4.72:1 (AA).
›What colours go with #666EB3?
Its complementary colour is #B3AB66, and analogous partners are #6695B3 and #8566B3.