#231B88#231B88

#231B88 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.170 H 274.7°. Best body text is #FFFFFF at 13.26:1 contrast (WCAG AA passes).

Color values

HEX	#231B88
RGB	rgb(35, 27, 136)
HSL	hsl(244, 67%, 32%)
HSV	hsv(244, 80%, 53%)
CMYK	cmyk(74.3%, 80.1%, 0%, 46.7%)
CIE-LAB	lab(19.71, 39.78, -58.49)
CIE-LCH	lch(19.71, 70.74, 304.22°)
OKLab	oklab(32.53% 0.0138 -0.1692)
OKLCH	oklch(32.53% 0.17 274.7)
XYZ	xyz(5.5275, 2.9182, 23.5597)
Luminance	0.0292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B88 #80881B

analogous

#1B4988 #231B88 #5A1B88

triadic

#231B88 #88231B #1B8823

tetradic

#231B88 #881B49 #80881B #1B885A

square

#231B88 #881B49 #80881B #1B885A

split-complementary

#231B88 #885A1B #49881B

monochromatic

#090722 #161155 #231B88 #3025BB #4F44DA

Accessibility & contrast

On white

13.26

#231B88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#231B88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B88

13.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B88	#FFFFFF	#000000	##FFFFFF
##231B88	1.00	13.26	1.58	13.26
#FFFFFF	13.26	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358B

Deuteranopia (green-blind)

#002B86

Tritanopia (blue-blind)

#003C51

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #231b88;
/* rgb */ color: rgb(35, 27, 136);
/* oklch */ color: oklch(32.5% 0.170 274.7);

Tailwind

colors: {
  custom: {
    50: '#705aac',
    500: '#231b88',
    950: '#000000',
  },
}

SCSS

$custom: #231b88;
$custom-light: #705aac;
$custom-dark: #000000;

JSON

{
  "hex": "#231b88",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 136
  },
  "hsl": {
    "h": 244.404,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32526,
    "c": 0.16973,
    "h": 274.7
  },
  "luminance": 0.02919
}

Semantic roles & 50–950 ramp

primary

#231B88

secondary

#B2BB44

accent

#EA3EDD

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #231B88

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

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