#231DA8#231DA8

#231DA8 is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 36.5% C 0.206 H 271.5°. Best body text is #FFFFFF at 11.59:1 contrast (WCAG AA passes).

Color values

HEX	#231DA8
RGB	rgb(35, 29, 168)
HSL	hsl(243, 71%, 39%)
HSV	hsv(243, 83%, 66%)
CMYK	cmyk(79.2%, 82.7%, 0%, 34.1%)
CIE-LAB	lab(23.88, 49.03, -71.30)
CIE-LCH	lch(23.88, 86.54, 304.52°)
OKLab	oklab(36.53% 0.0053 -0.2063)
OKLCH	oklch(36.53% 0.206 271.5)
XYZ	xyz(8.1980, 4.0623, 37.3902)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231DA8 #A2A81D

analogous

#1D5CA8 #231DA8 #681DA8

triadic

#231DA8 #A8231D #1DA823

tetradic

#231DA8 #A81D5C #A2A81D #1DA868

square

#231DA8 #A81D5C #A2A81D #1DA868

split-complementary

#231DA8 #A8681D #5CA81D

monochromatic

#0D0B40 #181474 #231DA8 #3028DA #625CE3

Accessibility & contrast

On white

11.59

#231DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#231DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231DA8

11.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231DA8	#FFFFFF	#000000	##FFFFFF
##231DA8	1.00	11.59	1.81	11.59
#FFFFFF	11.59	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FAC

Deuteranopia (green-blind)

#0032A6

Tritanopia (blue-blind)

#004A64

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #231da8;
/* rgb */ color: rgb(35, 29, 168);
/* oklch */ color: oklch(36.5% 0.206 271.5);

Tailwind

colors: {
  custom: {
    50: '#775dc3',
    500: '#231da8',
    950: '#000000',
  },
}

SCSS

$custom: #231da8;
$custom-light: #775dc3;
$custom-dark: #000000;

JSON

{
  "hex": "#231da8",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 168
  },
  "hsl": {
    "h": 242.59,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.36531,
    "c": 0.20641,
    "h": 271.5
  },
  "luminance": 0.04063
}

Semantic roles & 50–950 ramp

primary

#231DA8

secondary

#C2C75A

accent

#ED3AE6

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0413

muted

#7C7982

Preview Lab

Preview with #231DA8

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

Preview Lab → · Contrast checker → · Palette generator →