#183B89#183B89

#183B89 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.137 H 263.2°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#183B89
RGB	rgb(24, 59, 137)
HSL	hsl(221, 70%, 32%)
HSV	hsv(221, 82%, 54%)
CMYK	cmyk(82.5%, 56.9%, 0%, 46.3%)
CIE-LAB	lab(27.09, 18.24, -47.03)
CIE-LCH	lch(27.09, 50.44, 291.19°)
OKLab	oklab(37.8% -0.0162 -0.1357)
OKLCH	oklch(37.8% 0.137 263.2)
XYZ	xyz(6.4544, 5.1275, 24.3116)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B89 #896618

analogous

#187489 #183B89 #2E1889

triadic

#183B89 #89183B #3B8918

tetradic

#183B89 #891874 #896618 #18892E

square

#183B89 #891874 #896618 #18892E

split-complementary

#183B89 #892E18 #748918

monochromatic

#060E21 #0F2555 #183B89 #2151BD #3E6FDD

Accessibility & contrast

On white

10.37

#183B89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#183B89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B89

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B89	#FFFFFF	#000000	##FFFFFF
##183B89	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458C

Deuteranopia (green-blind)

#003B87

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183b89;
/* rgb */ color: rgb(24, 59, 137);
/* oklch */ color: oklch(37.8% 0.137 263.2);

Tailwind

colors: {
  custom: {
    50: '#6970ac',
    500: '#183b89',
    950: '#000000',
  },
}

SCSS

$custom: #183b89;
$custom-light: #6970ac;
$custom-dark: #000000;

JSON

{
  "hex": "#183b89",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 137
  },
  "hsl": {
    "h": 221.416,
    "s": 70.186,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37798,
    "c": 0.13671,
    "h": 263.2
  },
  "luminance": 0.05128
}

Semantic roles & 50–950 ramp

primary

#183B89

secondary

#BD9640

accent

#B63BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B89

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

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