#231D99#231D99

#231D99 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.8% C 0.189 H 272.7°. Best body text is #FFFFFF at 12.30:1 contrast (WCAG AA passes).

Color values

HEX	#231D99
RGB	rgb(35, 29, 153)
HSL	hsl(243, 68%, 36%)
HSV	hsv(243, 81%, 60%)
CMYK	cmyk(77.1%, 81%, 0%, 40%)
CIE-LAB	lab(22.07, 44.28, -65.15)
CIE-LCH	lch(22.07, 78.77, 304.20°)
OKLab	oklab(34.76% 0.0089 -0.1885)
OKLCH	oklch(34.76% 0.189 272.7)
XYZ	xyz(6.8803, 3.5352, 30.4506)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231D99 #93991D

analogous

#1D5599 #231D99 #611D99

triadic

#231D99 #99231D #1D9923

tetradic

#231D99 #991D55 #93991D #1D9961

square

#231D99 #991D55 #93991D #1D9961

split-complementary

#231D99 #99611D #55991D

monochromatic

#0B0932 #171366 #231D99 #2F27CC #5952DE

Accessibility & contrast

On white

12.30

#231D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#231D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231D99

12.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231D99	#FFFFFF	#000000	##FFFFFF
##231D99	1.00	12.30	1.71	12.30
#FFFFFF	12.30	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9C

Deuteranopia (green-blind)

#002F97

Tritanopia (blue-blind)

#00445B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #231d99;
/* rgb */ color: rgb(35, 29, 153);
/* oklch */ color: oklch(34.8% 0.189 272.7);

Tailwind

colors: {
  custom: {
    50: '#745cb8',
    500: '#231d99',
    950: '#000000',
  },
}

SCSS

$custom: #231d99;
$custom-light: #745cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#231d99",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 153
  },
  "hsl": {
    "h": 242.903,
    "s": 68.132,
    "l": 35.686
  },
  "oklch": {
    "l": 0.34756,
    "c": 0.18873,
    "h": 272.7
  },
  "luminance": 0.03536
}

Semantic roles & 50–950 ramp

primary

#231D99

secondary

#BCC151

accent

#EB3DE3

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231D99

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

Preview Lab → · Contrast checker → · Palette generator →