#231DA1#231DA1

#231DA1 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.7% C 0.198 H 272.0°. Best body text is #FFFFFF at 11.92:1 contrast (WCAG AA passes).

Color values

HEX	#231DA1
RGB	rgb(35, 29, 161)
HSL	hsl(243, 69%, 37%)
HSV	hsv(243, 82%, 63%)
CMYK	cmyk(78.3%, 82%, 0%, 36.9%)
CIE-LAB	lab(23.03, 46.84, -68.46)
CIE-LCH	lch(23.03, 82.95, 304.38°)
OKLab	oklab(35.7% 0.007 -0.1981)
OKLCH	oklch(35.7% 0.198 272)
XYZ	xyz(7.5634, 3.8084, 34.0478)
Luminance	0.0381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231DA1 #9BA11D

analogous

#1D59A1 #231DA1 #651DA1

triadic

#231DA1 #A1231D #1DA123

tetradic

#231DA1 #A11D59 #9BA11D #1DA165

square

#231DA1 #A11D59 #9BA11D #1DA165

split-complementary

#231DA1 #A1651D #59A11D

monochromatic

#0C0A39 #18146D #231DA1 #2E26D5 #5E58E1

Accessibility & contrast

On white

11.92

#231DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#231DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231DA1

11.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231DA1	#FFFFFF	#000000	##FFFFFF
##231DA1	1.00	11.92	1.76	11.92
#FFFFFF	11.92	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA5

Deuteranopia (green-blind)

#00309F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #231da1;
/* rgb */ color: rgb(35, 29, 161);
/* oklch */ color: oklch(35.7% 0.198 272.0);

Tailwind

colors: {
  custom: {
    50: '#765dbe',
    500: '#231da1',
    950: '#000000',
  },
}

SCSS

$custom: #231da1;
$custom-light: #765dbe;
$custom-dark: #000000;

JSON

{
  "hex": "#231da1",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 161
  },
  "hsl": {
    "h": 242.727,
    "s": 69.474,
    "l": 37.255
  },
  "oklch": {
    "l": 0.35698,
    "c": 0.19824,
    "h": 272
  },
  "luminance": 0.03809
}

Semantic roles & 50–950 ramp

primary

#231DA1

secondary

#BFC455

accent

#EC3CE4

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231DA1

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

Preview Lab → · Contrast checker → · Palette generator →