#183C87#183C87

#183C87 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.8% C 0.133 H 262.6°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#183C87
RGB	rgb(24, 60, 135)
HSL	hsl(221, 70%, 31%)
HSV	hsv(221, 82%, 53%)
CMYK	cmyk(82.2%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(27.23, 16.72, -45.58)
CIE-LCH	lch(27.23, 48.55, 290.14°)
OKLab	oklab(37.85% -0.0171 -0.1314)
OKLCH	oklch(37.85% 0.133 262.6)
XYZ	xyz(6.3642, 5.1744, 23.5803)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C87 #876318

analogous

#187387 #183C87 #2C1887

triadic

#183C87 #87183C #3C8718

tetradic

#183C87 #871873 #876318 #18872C

square

#183C87 #871873 #876318 #18872C

split-complementary

#183C87 #872C18 #738718

monochromatic

#060E1F #0F2553 #183C87 #2153BB #3D71DC

Accessibility & contrast

On white

10.32

#183C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#183C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C87

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C87	#FFFFFF	#000000	##FFFFFF
##183C87	1.00	10.32	2.04	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468A

Deuteranopia (green-blind)

#003B86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183c87;
/* rgb */ color: rgb(24, 60, 135);
/* oklch */ color: oklch(37.8% 0.133 262.6);

Tailwind

colors: {
  custom: {
    50: '#6971ab',
    500: '#183c87',
    950: '#000000',
  },
}

SCSS

$custom: #183c87;
$custom-light: #6971ab;
$custom-dark: #000000;

JSON

{
  "hex": "#183c87",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 220.541,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37847,
    "c": 0.13256,
    "h": 262.6
  },
  "luminance": 0.05175
}

Semantic roles & 50–950 ramp

primary

#183C87

secondary

#BB9340

accent

#B33BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183C87

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

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