ColorXprez

#333B4E

Charcoal · dark cool blue

About #333B4E

#333B4E is a muted, dark shade in the blue family. On screen it is built from 20% red, 23% green and 31% blue; for print, its CMYK mix is 35% cyan, 24% magenta, 0% yellow and 69% black. Its overall feel is cool.

Of the common colour names it is very close to Charcoal (ΔE 7.8); Gunmetal comes next. Its complementary colour, directly opposite on the colour wheel, is #4E4633 — a umber tone that gives the strongest contrast in hue.

Designers tend to use dark tones like #333B4E for headings, body text, footers and dark-mode backgrounds. White text reads best on it at 11.19:1 (a WCAG AAA pass). Used as a text colour on white, it is readable too (11.19:1).

Colour codes

HEX
RGB
HSL
HSV / HSB
CMYK
CIELAB
Decimal
CSS
Red51
Green59
Blue78

Closest named colours

Charcoal
#36454F · ΔE 7.8
Gunmetal
#2A3439 · ΔE 10.2
Graphite
#383838 · ΔE 12.9

ΔE measures visible difference: under 2 is barely noticeable, over 10 is clearly different.

Text on #333B4E

WCAG contrast for white and black text on this colour.

White heading text
Body copy set on charcoal #333B4E.
11.19:1AAA
Black heading text
Body copy set on charcoal #333B4E.
1.88:1Fail

Colour-blindness preview

How #333B4E appears to people with the three most common types of colour-vision deficiency.

Normal vision
#333B4E
Protanopia (no red cones)
#353C4F
Deuteranopia (no green cones)
#323A4E
Tritanopia (no blue cones)
#2B3F41

Shades, tints & matching colours

Tints and shades

Complementary

Analogous

Triadic

Split complementary

Tetradic

Similar colours

Frequently asked questions

›What colour is #333B4E?

#333B4E is a muted, dark shade in the blue family. On screen it is built from 20% red, 23% green and 31% blue; for print, its CMYK mix is 35% cyan, 24% magenta, 0% yellow and 69% black. Its overall feel is cool.

›What text colour should I use on #333B4E?

Use white text. White on #333B4E has a contrast ratio of 11.19:1 (AAA).

›What colours go with #333B4E?

Its complementary colour is #4E4633, and analogous partners are #33494E and #38334E.