#231D8D#231D8D

#231D8D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.4% C 0.174 H 273.9°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#231D8D
RGB	rgb(35, 29, 141)
HSL	hsl(243, 66%, 33%)
HSV	hsv(243, 79%, 55%)
CMYK	cmyk(75.2%, 79.4%, 0%, 44.7%)
CIE-LAB	lab(20.67, 40.35, -60.04)
CIE-LCH	lch(20.67, 72.34, 303.90°)
OKLab	oklab(33.37% 0.0117 -0.1737)
OKLCH	oklch(33.37% 0.174 273.9)
XYZ	xyz(5.9386, 3.1585, 25.4908)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D8D #878D1D

analogous

#1D4F8D #231D8D #5B1D8D

triadic

#231D8D #8D231D #1D8D23

tetradic

#231D8D #8D1D4F #878D1D #1D8D5B

square

#231D8D #8D1D4F #878D1D #1D8D5B

split-complementary

#231D8D #8D5B1D #4F8D1D

monochromatic

#0A0827 #16135A #231D8D #3027C0 #524BDA

Accessibility & contrast

On white

12.87

#231D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#231D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D8D

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D8D	#FFFFFF	#000000	##FFFFFF
##231D8D	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002C8B

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #231d8d;
/* rgb */ color: rgb(35, 29, 141);
/* oklch */ color: oklch(33.4% 0.174 273.9);

Tailwind

colors: {
  custom: {
    50: '#715bb0',
    500: '#231d8d',
    950: '#000000',
  },
}

SCSS

$custom: #231d8d;
$custom-light: #715bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#231d8d",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 141
  },
  "hsl": {
    "h": 243.214,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33365,
    "c": 0.1741,
    "h": 273.9
  },
  "luminance": 0.03159
}

Semantic roles & 50–950 ramp

primary

#231D8D

secondary

#B6BC4A

accent

#E93FE0

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #231D8D

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

Preview Lab → · Contrast checker → · Palette generator →