#183F89#183F89

#183F89 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.7% C 0.132 H 261.6°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#183F89
RGB	rgb(24, 63, 137)
HSL	hsl(219, 70%, 32%)
HSV	hsv(219, 82%, 54%)
CMYK	cmyk(82.5%, 54%, 0%, 46.3%)
CIE-LAB	lab(28.26, 15.44, -45.14)
CIE-LCH	lch(28.26, 47.71, 288.88°)
OKLab	oklab(38.68% -0.0192 -0.1301)
OKLCH	oklch(38.68% 0.132 261.6)
XYZ	xyz(6.6679, 5.5546, 24.3828)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F89 #896218

analogous

#187889 #183F89 #2A1889

triadic

#183F89 #89183F #3F8918

tetradic

#183F89 #891878 #896218 #18892A

square

#183F89 #891878 #896218 #18892A

split-complementary

#183F89 #892A18 #788918

monochromatic

#060F21 #0F2755 #183F89 #2157BD #3E75DD

Accessibility & contrast

On white

9.95

#183F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#183F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F89

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F89	#FFFFFF	#000000	##FFFFFF
##183F89	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08488C

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #183f89;
/* rgb */ color: rgb(24, 63, 137);
/* oklch */ color: oklch(38.7% 0.132 261.6);

Tailwind

colors: {
  custom: {
    50: '#6973ac',
    500: '#183f89',
    950: '#000000',
  },
}

SCSS

$custom: #183f89;
$custom-light: #6973ac;
$custom-dark: #000000;

JSON

{
  "hex": "#183f89",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 219.292,
    "s": 70.186,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38681,
    "c": 0.13151,
    "h": 261.6
  },
  "luminance": 0.05555
}

Semantic roles & 50–950 ramp

primary

#183F89

secondary

#BD9240

accent

#AF3BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183F89

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →