#183D87#183D87

#183D87 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.131 H 262.2°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#183D87
RGB	rgb(24, 61, 135)
HSL	hsl(220, 70%, 31%)
HSV	hsv(220, 82%, 53%)
CMYK	cmyk(82.2%, 54.8%, 0%, 47.1%)
CIE-LAB	lab(27.52, 16.02, -45.10)
CIE-LCH	lch(27.52, 47.86, 289.55°)
OKLab	oklab(38.07% -0.0179 -0.13)
OKLCH	oklch(38.07% 0.131 262.2)
XYZ	xyz(6.4170, 5.2802, 23.5979)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D87 #876218

analogous

#187487 #183D87 #2A1887

triadic

#183D87 #87183D #3D8718

tetradic

#183D87 #871874 #876218 #18872A

square

#183D87 #871874 #876218 #18872A

split-complementary

#183D87 #872A18 #748718

monochromatic

#060E1F #0F2653 #183D87 #2154BB #3D72DC

Accessibility & contrast

On white

10.21

#183D87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#183D87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D87

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D87	#FFFFFF	#000000	##FFFFFF
##183D87	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03468A

Deuteranopia (green-blind)

#003C86

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183d87;
/* rgb */ color: rgb(24, 61, 135);
/* oklch */ color: oklch(38.1% 0.131 262.2);

Tailwind

colors: {
  custom: {
    50: '#6971ab',
    500: '#183d87',
    950: '#000000',
  },
}

SCSS

$custom: #183d87;
$custom-light: #6971ab;
$custom-dark: #000000;

JSON

{
  "hex": "#183d87",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 135
  },
  "hsl": {
    "h": 220,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38069,
    "c": 0.13126,
    "h": 262.2
  },
  "luminance": 0.05281
}

Semantic roles & 50–950 ramp

primary

#183D87

secondary

#BB9240

accent

#B13BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183D87

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

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