#C9CDEE
Periwinkle · very light cool blue
About #C9CDEE
#C9CDEE is a muted, very light shade in the blue family. On screen it is built from 79% red, 80% green and 93% blue; for print, its CMYK mix is 16% cyan, 14% magenta, 0% yellow and 7% black. Its overall feel is cool.
Of the common colour names it is similar to Periwinkle (ΔE 9.7); Lavender comes next. Its complementary colour, directly opposite on the colour wheel, is #EEEAC9 — a beige tone that gives the strongest contrast in hue.
Designers tend to use very light tones like #C9CDEE for backgrounds, page sections and subtle cards. Black text reads best on it at 13.45:1 (a WCAG AAA pass).
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 #C9CDEE
WCAG contrast for white and black text on this colour.
Colour-blindness preview
How #C9CDEE 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 #C9CDEE?
#C9CDEE is a muted, very light shade in the blue family. On screen it is built from 79% red, 80% green and 93% blue; for print, its CMYK mix is 16% cyan, 14% magenta, 0% yellow and 7% black. Its overall feel is cool.
›What text colour should I use on #C9CDEE?
Use black text. Black on #C9CDEE has a contrast ratio of 13.45:1 (AAA).
›What colours go with #C9CDEE?
Its complementary colour is #EEEAC9, and analogous partners are #C9DFEE and #D8C9EE.