#183AB4#183AB4

#183AB4 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.6% C 0.196 H 265.5°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#183AB4
RGB	rgb(24, 58, 180)
HSL	hsl(227, 76%, 40%)
HSV	hsv(227, 87%, 71%)
CMYK	cmyk(86.7%, 67.8%, 0%, 29.4%)
CIE-LAB	lab(30.67, 35.84, -67.27)
CIE-LCH	lch(30.67, 76.22, 298.05°)
OKLab	oklab(41.64% -0.0152 -0.195)
OKLCH	oklch(41.64% 0.196 265.5)
XYZ	xyz(10.1251, 6.5143, 43.8949)
Luminance	0.0652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183AB4 #B49218

analogous

#1888B4 #183AB4 #4418B4

triadic

#183AB4 #B4183A #3AB418

tetradic

#183AB4 #B41888 #B49218 #18B444

square

#183AB4 #B41888 #B49218 #18B444

split-complementary

#183AB4 #B44418 #88B418

monochromatic

#0A1748 #11297E #183AB4 #2750E2 #5D7CE9

Accessibility & contrast

On white

9.12

#183AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#183AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183AB4

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183AB4	#FFFFFF	#000000	##FFFFFF
##183AB4	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B8

Deuteranopia (green-blind)

#0041B2

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #183ab4;
/* rgb */ color: rgb(24, 58, 180);
/* oklch */ color: oklch(41.6% 0.196 265.5);

Tailwind

colors: {
  custom: {
    50: '#7570cc',
    500: '#183ab4',
    950: '#000000',
  },
}

SCSS

$custom: #183ab4;
$custom-light: #7570cc;
$custom-dark: #000000;

JSON

{
  "hex": "#183ab4",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 180
  },
  "hsl": {
    "h": 226.923,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.41638,
    "c": 0.19562,
    "h": 265.5
  },
  "luminance": 0.06516
}

Semantic roles & 50–950 ramp

primary

#183AB4

secondary

#CDB45B

accent

#CA35F3

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #183AB4

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

Preview Lab → · Contrast checker → · Palette generator →