#183E87#183E87

#183E87 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.130 H 261.8°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#183E87
RGB	rgb(24, 62, 135)
HSL	hsl(219, 70%, 31%)
HSV	hsv(219, 82%, 53%)
CMYK	cmyk(82.2%, 54.1%, 0%, 47.1%)
CIE-LAB	lab(27.81, 15.32, -44.63)
CIE-LCH	lch(27.81, 47.18, 288.94°)
OKLab	oklab(38.29% -0.0186 -0.1286)
OKLCH	oklch(38.29% 0.13 261.8)
XYZ	xyz(6.4709, 5.3879, 23.6159)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E87 #876118

analogous

#187587 #183E87 #291887

triadic

#183E87 #87183E #3E8718

tetradic

#183E87 #871875 #876118 #188729

square

#183E87 #871875 #876118 #188729

split-complementary

#183E87 #872918 #758718

monochromatic

#060E1F #0F2653 #183E87 #2156BB #3D74DC

Accessibility & contrast

On white

10.11

#183E87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#183E87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E87

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E87	#FFFFFF	#000000	##FFFFFF
##183E87	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08478A

Deuteranopia (green-blind)

#003D86

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183e87;
/* rgb */ color: rgb(24, 62, 135);
/* oklch */ color: oklch(38.3% 0.130 261.8);

Tailwind

colors: {
  custom: {
    50: '#6872ab',
    500: '#183e87',
    950: '#000000',
  },
}

SCSS

$custom: #183e87;
$custom-light: #6872ab;
$custom-dark: #000000;

JSON

{
  "hex": "#183e87",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 135
  },
  "hsl": {
    "h": 219.459,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38292,
    "c": 0.12996,
    "h": 261.8
  },
  "luminance": 0.05389
}

Semantic roles & 50–950 ramp

primary

#183E87

secondary

#BB9140

accent

#B03BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183E87

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

Preview Lab → · Contrast checker → · Palette generator →