#231B9D#231B9D

#231B9D is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.0% C 0.195 H 272.5°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#231B9D
RGB	rgb(35, 27, 157)
HSL	hsl(244, 71%, 36%)
HSV	hsv(244, 83%, 62%)
CMYK	cmyk(77.7%, 82.8%, 0%, 38.4%)
CIE-LAB	lab(22.21, 46.55, -67.37)
CIE-LCH	lch(22.21, 81.89, 304.64°)
OKLab	oklab(34.99% 0.0085 -0.1949)
OKLCH	oklch(34.99% 0.195 272.5)
XYZ	xyz(7.1688, 3.5747, 32.2039)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B9D #959D1B

analogous

#1B549D #231B9D #641B9D

triadic

#231B9D #9D231B #1B9D23

tetradic

#231B9D #9D1B54 #959D1B #1B9D64

square

#231B9D #9D1B54 #959D1B #1B9D64

split-complementary

#231B9D #9D641B #549D1B

monochromatic

#0C0935 #171269 #231B9D #2F24D1 #5A51E1

Accessibility & contrast

On white

12.24

#231B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#231B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B9D

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B9D	#FFFFFF	#000000	##FFFFFF
##231B9D	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA1

Deuteranopia (green-blind)

#002F9B

Tritanopia (blue-blind)

#00445D

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #231b9d;
/* rgb */ color: rgb(35, 27, 157);
/* oklch */ color: oklch(35.0% 0.195 272.5);

Tailwind

colors: {
  custom: {
    50: '#755bbb',
    500: '#231b9d',
    950: '#000000',
  },
}

SCSS

$custom: #231b9d;
$custom-light: #755bbb;
$custom-dark: #000000;

JSON

{
  "hex": "#231b9d",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 157
  },
  "hsl": {
    "h": 243.692,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.34993,
    "c": 0.19511,
    "h": 272.5
  },
  "luminance": 0.03576
}

Semantic roles & 50–950 ramp

primary

#231B9D

secondary

#BDC450

accent

#ED3AE2

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231B9D

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

Preview Lab → · Contrast checker → · Palette generator →