#231D8A#231D8A

#231D8A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.0% C 0.170 H 274.2°. Best body text is #FFFFFF at 13.01:1 contrast (WCAG AA passes).

Color values

HEX	#231D8A
RGB	rgb(35, 29, 138)
HSL	hsl(243, 65%, 33%)
HSV	hsv(243, 79%, 54%)
CMYK	cmyk(74.6%, 79%, 0%, 45.9%)
CIE-LAB	lab(20.32, 39.35, -58.74)
CIE-LCH	lch(20.32, 70.70, 303.82°)
OKLab	oklab(33.02% 0.0124 -0.1699)
OKLCH	oklch(33.02% 0.17 274.2)
XYZ	xyz(5.7184, 3.0705, 24.3311)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D8A #848A1D

analogous

#1D4D8A #231D8A #5A1D8A

triadic

#231D8A #8A231D #1D8A23

tetradic

#231D8A #8A1D4D #848A1D #1D8A5A

square

#231D8A #8A1D4D #848A1D #1D8A5A

split-complementary

#231D8A #8A5A1D #4D8A1D

monochromatic

#090825 #161257 #231D8A #3028BD #5149D9

Accessibility & contrast

On white

13.01

#231D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#231D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D8A

13.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D8A	#FFFFFF	#000000	##FFFFFF
##231D8A	1.00	13.01	1.61	13.01
#FFFFFF	13.01	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368D

Deuteranopia (green-blind)

#002C88

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231d8a;
/* rgb */ color: rgb(35, 29, 138);
/* oklch */ color: oklch(33.0% 0.170 274.2);

Tailwind

colors: {
  custom: {
    50: '#705bad',
    500: '#231d8a',
    950: '#000000',
  },
}

SCSS

$custom: #231d8a;
$custom-light: #705bad;
$custom-dark: #000000;

JSON

{
  "hex": "#231d8a",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 138
  },
  "hsl": {
    "h": 243.303,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33022,
    "c": 0.17036,
    "h": 274.2
  },
  "luminance": 0.03071
}

Semantic roles & 50–950 ramp

primary

#231D8A

secondary

#B4BB48

accent

#E840DF

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #231D8A

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

Preview Lab → · Contrast checker → · Palette generator →