#231D8E#231D8E

#231D8E is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.5% C 0.175 H 273.8°. Best body text is #FFFFFF at 12.82:1 contrast (WCAG AA passes).

Color values

HEX	#231D8E
RGB	rgb(35, 29, 142)
HSL	hsl(243, 66%, 34%)
HSV	hsv(243, 80%, 56%)
CMYK	cmyk(75.4%, 79.6%, 0%, 44.3%)
CIE-LAB	lab(20.78, 40.69, -60.48)
CIE-LCH	lch(20.78, 72.89, 303.93°)
OKLab	oklab(33.48% 0.0115 -0.175)
OKLCH	oklch(33.48% 0.175 273.8)
XYZ	xyz(6.0134, 3.1884, 25.8845)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D8E #888E1D

analogous

#1D4F8E #231D8E #5B1D8E

triadic

#231D8E #8E231D #1D8E23

tetradic

#231D8E #8E1D4F #888E1D #1D8E5B

square

#231D8E #8E1D4F #888E1D #1D8E5B

split-complementary

#231D8E #8E5B1D #4F8E1D

monochromatic

#0A0828 #16135B #231D8E #3027C1 #534BDA

Accessibility & contrast

On white

12.82

#231D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#231D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D8E

12.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D8E	#FFFFFF	#000000	##FFFFFF
##231D8E	1.00	12.82	1.64	12.82
#FFFFFF	12.82	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003791

Deuteranopia (green-blind)

#002D8C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #231d8e;
/* rgb */ color: rgb(35, 29, 142);
/* oklch */ color: oklch(33.5% 0.175 273.8);

Tailwind

colors: {
  custom: {
    50: '#715cb0',
    500: '#231d8e',
    950: '#000000',
  },
}

SCSS

$custom: #231d8e;
$custom-light: #715cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#231d8e",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 142
  },
  "hsl": {
    "h": 243.186,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.3348,
    "c": 0.17534,
    "h": 273.8
  },
  "luminance": 0.03189
}

Semantic roles & 50–950 ramp

primary

#231D8E

secondary

#B7BD4A

accent

#E93FE0

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #231D8E

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

Preview Lab → · Contrast checker → · Palette generator →