Close to Charcoal Blue
#183B4A
#183B4A is a very dark, rich blue, close to the color Charcoal Blue. In RGB it’s made of 9.4% red, 23.1% green, and 29% blue. Its hue is 198°, with 51% saturation and 19% lightness, so it reads as a cool color. White text sits best on top of it.
Color codes
Tints, shades & tones
Tints add white, shades add black, tones add gray. Tap any one to open its page.
Tints
Shades
Tones
Color harmonies
Combinations from the color wheel, built around #183B4A.
Split complementary
The two neighbors of the complement: contrast that’s easier to balance.
Open in the palette creator →Tetradic
Two complementary pairs: rich, best with one color in charge.
Open in the palette creator →Contrast & readability
WCAG contrast ratios for text. 4.5:1 is the minimum for body text, 3:1 for large text.
White text on this color
11.91:1 AAABlack text on this color
1.76:1 FailThis color as text on white
11.91:1 AAAThis color as text on black
1.76:1 FailHow it looks with color blindness
About 1 in 12 men and 1 in 200 women see color differently. Here’s #183B4A as they’d see it.
#183B4A in use
A headline in this color
Body text stays dark for reading; the color carries buttons, links, and accents.
On a dark background
Get startedSimilar colors
Brands with a similar color
Brand names identify the brands only; no affiliation. Test yourself in Brand Colors.
Questions about #183B4A
What color is #183B4A?
#183B4A is a very dark, rich blue, close to the color Charcoal Blue. In RGB it’s made of 9.4% red, 23.1% green, and 29% blue. Its hue is 198°, with 51% saturation and 19% lightness, so it reads as a cool color. White text sits best on top of it.
What is #183B4A in RGB?
#183B4A is rgb(24, 59, 74): 24 red, 59 green, and 74 blue on a 0–255 scale.
What is #183B4A in CMYK?
Roughly cmyk(68, 20, 0, 71). Print results depend on paper and press, so proof it before a big print run.
What Pantone is closest to #183B4A?
PANTONE 309 C is the closest match in our list. Screen colors and ink never match perfectly; check a physical Pantone guide.
What color goes with #183B4A?
Its complement #4A3127 gives the strongest contrast. For something calmer, try its analogous neighbors, or its own tints and shades above.