#183387#183387

#183387 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.144 H 265.7°. Best body text is #FFFFFF at 11.28:1 contrast (WCAG AA passes).

Color values

HEX	#183387
RGB	rgb(24, 51, 135)
HSL	hsl(225, 70%, 31%)
HSV	hsv(225, 82%, 53%)
CMYK	cmyk(82.2%, 62.2%, 0%, 47.1%)
CIE-LAB	lab(24.67, 23.02, -49.74)
CIE-LCH	lch(24.67, 54.80, 294.84°)
OKLab	oklab(35.93% -0.0109 -0.1438)
OKLCH	oklch(35.93% 0.144 265.7)
XYZ	xyz(5.9321, 4.3104, 23.4363)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183387 #876C18

analogous

#186A87 #183387 #341887

triadic

#183387 #871833 #338718

tetradic

#183387 #87186A #876C18 #188734

square

#183387 #87186A #876C18 #188734

split-complementary

#183387 #873418 #6A8718

monochromatic

#060C1F #0F1F53 #183387 #2147BB #3D64DC

Accessibility & contrast

On white

11.28

#183387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183387

11.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183387	#FFFFFF	#000000	##FFFFFF
##183387	1.00	11.28	1.86	11.28
#FFFFFF	11.28	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408A

Deuteranopia (green-blind)

#003685

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183387;
/* rgb */ color: rgb(24, 51, 135);
/* oklch */ color: oklch(35.9% 0.144 265.7);

Tailwind

colors: {
  custom: {
    50: '#696aab',
    500: '#183387',
    950: '#000000',
  },
}

SCSS

$custom: #183387;
$custom-light: #696aab;
$custom-dark: #000000;

JSON

{
  "hex": "#183387",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 135
  },
  "hsl": {
    "h": 225.405,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35927,
    "c": 0.14424,
    "h": 265.7
  },
  "luminance": 0.04311
}

Semantic roles & 50–950 ramp

primary

#183387

secondary

#BB9D40

accent

#C13BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #183387

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

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