#183F76#183F76

#183F76 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.104 H 257.7°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#183F76
RGB	rgb(24, 63, 118)
HSL	hsl(215, 66%, 28%)
HSV	hsv(215, 80%, 46%)
CMYK	cmyk(79.7%, 46.6%, 0%, 53.7%)
CIE-LAB	lab(26.90, 7.59, -35.45)
CIE-LCH	lch(26.90, 36.26, 282.09°)
OKLab	oklab(37.2% -0.0222 -0.1016)
OKLCH	oklch(37.2% 0.104 257.7)
XYZ	xyz(5.4230, 5.0566, 17.8262)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F76 #764F18

analogous

#186E76 #183F76 #201876

triadic

#183F76 #76183F #3F7618

tetradic

#183F76 #76186E #764F18 #187620

square

#183F76 #76186E #764F18 #187620

split-complementary

#183F76 #762018 #6E7618

monochromatic

#050E19 #0E2443 #183F76 #225AA9 #3376D5

Accessibility & contrast

On white

10.44

#183F76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183F76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F76

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F76	#FFFFFF	#000000	##FFFFFF
##183F76	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234478

Deuteranopia (green-blind)

#0F3C75

Tritanopia (blue-blind)

#004C54

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183f76;
/* rgb */ color: rgb(24, 63, 118);
/* oklch */ color: oklch(37.2% 0.104 257.7);

Tailwind

colors: {
  custom: {
    50: '#64739e',
    500: '#183f76',
    950: '#000000',
  },
}

SCSS

$custom: #183f76;
$custom-light: #64739e;
$custom-dark: #000000;

JSON

{
  "hex": "#183f76",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 118
  },
  "hsl": {
    "h": 215.106,
    "s": 66.197,
    "l": 27.843
  },
  "oklch": {
    "l": 0.37199,
    "c": 0.104,
    "h": 257.7
  },
  "luminance": 0.05057
}

Semantic roles & 50–950 ramp

primary

#183F76

secondary

#AB7E3F

accent

#A23FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F76

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

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