#231B61#231B61

#231B61 is a dark, moderate blue. Relative luminance 0.020; OKLCH L 28.3% C 0.118 H 280.9°. Best body text is #FFFFFF at 14.99:1 contrast (WCAG AA passes).

Color values

HEX	#231B61
RGB	rgb(35, 27, 97)
HSL	hsl(247, 56%, 24%)
HSV	hsv(247, 72%, 38%)
CMYK	cmyk(63.9%, 72.2%, 0%, 62%)
CIE-LAB	lab(15.51, 26.34, -40.28)
CIE-LCH	lch(15.51, 48.13, 303.19°)
OKLab	oklab(28.28% 0.0223 -0.116)
OKLCH	oklch(28.28% 0.118 280.9)
XYZ	xyz(3.2421, 2.0040, 11.5229)
Luminance	0.0200 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B61 #59611B

analogous

#1B3661 #231B61 #461B61

triadic

#231B61 #61231B #1B6123

tetradic

#231B61 #611B36 #59611B #1B6146

square

#231B61 #611B36 #59611B #1B6146

split-complementary

#231B61 #61461B #36611B

monochromatic

#090718 #120E31 #231B61 #342891 #4636C1

Accessibility & contrast

On white

14.99

#231B61 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#231B61 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B61

14.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B61	#FFFFFF	#000000	##FFFFFF
##231B61	1.00	14.99	1.40	14.99
#FFFFFF	14.99	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002963

Deuteranopia (green-blind)

#002460

Tritanopia (blue-blind)

#002D3B

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #231b61;
/* rgb */ color: rgb(35, 27, 97);
/* oklch */ color: oklch(28.3% 0.118 280.9);

Tailwind

colors: {
  custom: {
    50: '#66588f',
    500: '#231b61',
    950: '#000000',
  },
}

SCSS

$custom: #231b61;
$custom-light: #66588f;
$custom-dark: #000000;

JSON

{
  "hex": "#231b61",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 97
  },
  "hsl": {
    "h": 246.857,
    "s": 56.452,
    "l": 24.314
  },
  "oklch": {
    "l": 0.28283,
    "c": 0.11813,
    "h": 280.9
  },
  "luminance": 0.02004
}

Semantic roles & 50–950 ramp

primary

#231B61

secondary

#8D9741

accent

#E048CE

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #231B61

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

Preview Lab → · Contrast checker → · Palette generator →