#183A85#183A85

#183A85 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.132 H 263.1°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#183A85
RGB	rgb(24, 58, 133)
HSL	hsl(221, 69%, 31%)
HSV	hsv(221, 82%, 52%)
CMYK	cmyk(82%, 56.4%, 0%, 47.8%)
CIE-LAB	lab(26.49, 17.30, -45.53)
CIE-LCH	lch(26.49, 48.71, 290.80°)
OKLab	oklab(37.24% -0.0158 -0.1314)
OKLCH	oklch(37.24% 0.132 263.1)
XYZ	xyz(6.1219, 4.9130, 22.8114)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A85 #856318

analogous

#187085 #183A85 #2C1885

triadic

#183A85 #85183A #3A8518

tetradic

#183A85 #851870 #856318 #18852C

square

#183A85 #851870 #856318 #18852C

split-complementary

#183A85 #852C18 #708518

monochromatic

#050D1D #0F2351 #183A85 #2151B9 #3C6EDC

Accessibility & contrast

On white

10.59

#183A85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183A85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A85

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A85	#FFFFFF	#000000	##FFFFFF
##183A85	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004488

Deuteranopia (green-blind)

#003A84

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183a85;
/* rgb */ color: rgb(24, 58, 133);
/* oklch */ color: oklch(37.2% 0.132 263.1);

Tailwind

colors: {
  custom: {
    50: '#686fa9',
    500: '#183a85',
    950: '#000000',
  },
}

SCSS

$custom: #183a85;
$custom-light: #686fa9;
$custom-dark: #000000;

JSON

{
  "hex": "#183a85",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 133
  },
  "hsl": {
    "h": 221.284,
    "s": 69.427,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37236,
    "c": 0.13232,
    "h": 263.1
  },
  "luminance": 0.04914
}

Semantic roles & 50–950 ramp

primary

#183A85

secondary

#B99340

accent

#B53CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183A85

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

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