#231B90#231B90

#231B90 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.5% C 0.180 H 273.8°. Best body text is #FFFFFF at 12.88:1 contrast (WCAG AA passes).

Color values

HEX	#231B90
RGB	rgb(35, 27, 144)
HSL	hsl(244, 68%, 34%)
HSV	hsv(244, 81%, 56%)
CMYK	cmyk(75.7%, 81.3%, 0%, 43.5%)
CIE-LAB	lab(20.65, 42.40, -61.94)
CIE-LCH	lch(20.65, 75.06, 304.39°)
OKLab	oklab(33.46% 0.0118 -0.1792)
OKLCH	oklch(33.46% 0.18 273.8)
XYZ	xyz(6.1174, 3.1542, 26.6666)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B90 #88901B

analogous

#1B4D90 #231B90 #5D1B90

triadic

#231B90 #90231B #1B9023

tetradic

#231B90 #901B4D #88901B #1B905D

square

#231B90 #901B4D #88901B #1B905D

split-complementary

#231B90 #905D1B #4D901B

monochromatic

#0A0829 #16115C #231B90 #3025C4 #5349DD

Accessibility & contrast

On white

12.88

#231B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#231B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B90

12.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B90	#FFFFFF	#000000	##FFFFFF
##231B90	1.00	12.88	1.63	12.88
#FFFFFF	12.88	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003793

Deuteranopia (green-blind)

#002C8E

Tritanopia (blue-blind)

#003F56

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #231b90;
/* rgb */ color: rgb(35, 27, 144);
/* oklch */ color: oklch(33.5% 0.180 273.8);

Tailwind

colors: {
  custom: {
    50: '#725bb2',
    500: '#231b90',
    950: '#000000',
  },
}

SCSS

$custom: #231b90;
$custom-light: #725bb2;
$custom-dark: #000000;

JSON

{
  "hex": "#231b90",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 144
  },
  "hsl": {
    "h": 244.103,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.33456,
    "c": 0.17957,
    "h": 273.8
  },
  "luminance": 0.03155
}

Semantic roles & 50–950 ramp

primary

#231B90

secondary

#B7BF48

accent

#EB3DDF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #231B90

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

Preview Lab → · Contrast checker → · Palette generator →