#183B87#183B87

#183B87 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.134 H 263.0°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#183B87
RGB	rgb(24, 59, 135)
HSL	hsl(221, 70%, 31%)
HSV	hsv(221, 82%, 53%)
CMYK	cmyk(82.2%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(26.93, 17.42, -46.05)
CIE-LCH	lch(26.93, 49.23, 290.72°)
OKLab	oklab(37.63% -0.0164 -0.1329)
OKLCH	oklch(37.63% 0.134 263)
XYZ	xyz(6.3123, 5.0706, 23.5630)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B87 #876418

analogous

#187287 #183B87 #2C1887

triadic

#183B87 #87183B #3B8718

tetradic

#183B87 #871872 #876418 #18872C

square

#183B87 #871872 #876418 #18872C

split-complementary

#183B87 #872C18 #728718

monochromatic

#060E1F #0F2453 #183B87 #2152BB #3D6FDC

Accessibility & contrast

On white

10.43

#183B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B87

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B87	#FFFFFF	#000000	##FFFFFF
##183B87	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458A

Deuteranopia (green-blind)

#003B86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183b87;
/* rgb */ color: rgb(24, 59, 135);
/* oklch */ color: oklch(37.6% 0.134 263.0);

Tailwind

colors: {
  custom: {
    50: '#6970ab',
    500: '#183b87',
    950: '#000000',
  },
}

SCSS

$custom: #183b87;
$custom-light: #6970ab;
$custom-dark: #000000;

JSON

{
  "hex": "#183b87",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 221.081,
    "s": 69.811,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37626,
    "c": 0.13387,
    "h": 263
  },
  "luminance": 0.05071
}

Semantic roles & 50–950 ramp

primary

#183B87

secondary

#BB9440

accent

#B53BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B87

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

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