#183E88#183E88

#183E88 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.131 H 261.9°. Best body text is #FFFFFF at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#183E88
RGB	rgb(24, 62, 136)
HSL	hsl(220, 70%, 31%)
HSV	hsv(220, 82%, 53%)
CMYK	cmyk(82.4%, 54.4%, 0%, 46.7%)
CIE-LAB	lab(27.89, 15.73, -45.12)
CIE-LCH	lch(27.89, 47.79, 289.22°)
OKLab	oklab(38.38% -0.0185 -0.1301)
OKLCH	oklch(38.38% 0.131 261.9)
XYZ	xyz(6.5416, 5.4162, 23.9884)
Luminance	0.0542 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E88 #886218

analogous

#187688 #183E88 #2A1888

triadic

#183E88 #88183E #3E8818

tetradic

#183E88 #881876 #886218 #18882A

square

#183E88 #881876 #886218 #18882A

split-complementary

#183E88 #882A18 #768818

monochromatic

#060F20 #0F2654 #183E88 #2156BC #3E74DD

Accessibility & contrast

On white

10.08

#183E88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#183E88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E88

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E88	#FFFFFF	#000000	##FFFFFF
##183E88	1.00	10.08	2.08	10.08
#FFFFFF	10.08	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05478B

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183e88;
/* rgb */ color: rgb(24, 62, 136);
/* oklch */ color: oklch(38.4% 0.131 261.9);

Tailwind

colors: {
  custom: {
    50: '#6972ab',
    500: '#183e88',
    950: '#000000',
  },
}

SCSS

$custom: #183e88;
$custom-light: #6972ab;
$custom-dark: #000000;

JSON

{
  "hex": "#183e88",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 136
  },
  "hsl": {
    "h": 219.643,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38375,
    "c": 0.13139,
    "h": 261.9
  },
  "luminance": 0.05417
}

Semantic roles & 50–950 ramp

primary

#183E88

secondary

#BC9240

accent

#B03BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183E88

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

Preview Lab → · Contrast checker → · Palette generator →