#183C8D#183C8D

#183C8D is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.141 H 263.2°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#183C8D
RGB	rgb(24, 60, 141)
HSL	hsl(222, 71%, 32%)
HSV	hsv(222, 83%, 55%)
CMYK	cmyk(83%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(27.70, 19.17, -48.52)
CIE-LCH	lch(27.70, 52.17, 291.56°)
OKLab	oklab(38.36% -0.0166 -0.1401)
OKLCH	oklch(38.36% 0.141 263.2)
XYZ	xyz(6.7985, 5.3482, 25.8681)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C8D #8D6918

analogous

#18778D #183C8D #2E188D

triadic

#183C8D #8D183C #3C8D18

tetradic

#183C8D #8D1877 #8D6918 #188D2E

square

#183C8D #8D1877 #8D6918 #188D2E

split-complementary

#183C8D #8D2E18 #778D18

monochromatic

#060F24 #0F2659 #183C8D #2152C1 #4171DF

Accessibility & contrast

On white

10.15

#183C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#183C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C8D

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C8D	#FFFFFF	#000000	##FFFFFF
##183C8D	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003C8B

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183c8d;
/* rgb */ color: rgb(24, 60, 141);
/* oklch */ color: oklch(38.4% 0.141 263.2);

Tailwind

colors: {
  custom: {
    50: '#6a71af',
    500: '#183c8d',
    950: '#000000',
  },
}

SCSS

$custom: #183c8d;
$custom-light: #6a71af;
$custom-dark: #000000;

JSON

{
  "hex": "#183c8d",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 221.538,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38359,
    "c": 0.14108,
    "h": 263.2
  },
  "luminance": 0.05349
}

Semantic roles & 50–950 ramp

primary

#183C8D

secondary

#BF9942

accent

#B63AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #183C8D

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

Preview Lab → · Contrast checker → · Palette generator →