#183B85#183B85

#183B85 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.131 H 262.7°. Best body text is #FFFFFF at 10.48:1 contrast (WCAG AA passes).

Color values

HEX	#183B85
RGB	rgb(24, 59, 133)
HSL	hsl(221, 69%, 31%)
HSV	hsv(221, 82%, 52%)
CMYK	cmyk(82%, 55.6%, 0%, 47.8%)
CIE-LAB	lab(26.78, 16.60, -45.06)
CIE-LCH	lch(26.78, 48.02, 290.22°)
OKLab	oklab(37.46% -0.0166 -0.13)
OKLCH	oklch(37.46% 0.131 262.7)
XYZ	xyz(6.1728, 5.0148, 22.8284)
Luminance	0.0502 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B85 #856218

analogous

#187185 #183B85 #2B1885

triadic

#183B85 #85183B #3B8518

tetradic

#183B85 #851871 #856218 #18852B

square

#183B85 #851871 #856218 #18852B

split-complementary

#183B85 #852B18 #718518

monochromatic

#050D1D #0F2451 #183B85 #2152B9 #3C6FDC

Accessibility & contrast

On white

10.48

#183B85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183B85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B85

10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B85	#FFFFFF	#000000	##FFFFFF
##183B85	1.00	10.48	2.00	10.48
#FFFFFF	10.48	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004588

Deuteranopia (green-blind)

#003B84

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183b85;
/* rgb */ color: rgb(24, 59, 133);
/* oklch */ color: oklch(37.5% 0.131 262.7);

Tailwind

colors: {
  custom: {
    50: '#6870a9',
    500: '#183b85',
    950: '#000000',
  },
}

SCSS

$custom: #183b85;
$custom-light: #6870a9;
$custom-dark: #000000;

JSON

{
  "hex": "#183b85",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 133
  },
  "hsl": {
    "h": 220.734,
    "s": 69.427,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37457,
    "c": 0.13101,
    "h": 262.7
  },
  "luminance": 0.05016
}

Semantic roles & 50–950 ramp

primary

#183B85

secondary

#B99240

accent

#B43CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B85

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

Preview Lab → · Contrast checker → · Palette generator →