#231DB4#231DB4

#231DB4 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 38.0% C 0.220 H 270.6°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#231DB4
RGB	rgb(35, 29, 180)
HSL	hsl(242, 72%, 41%)
HSV	hsv(242, 84%, 71%)
CMYK	cmyk(80.6%, 83.9%, 0%, 29.4%)
CIE-LAB	lab(25.35, 52.72, -76.06)
CIE-LCH	lch(25.35, 92.55, 304.73°)
OKLab	oklab(37.97% 0.0025 -0.2201)
OKLCH	oklch(37.97% 0.22 270.6)
XYZ	xyz(9.3679, 4.5303, 43.5519)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231DB4 #AEB41D

analogous

#1D62B4 #231DB4 #6E1DB4

triadic

#231DB4 #B4231D #1DB423

tetradic

#231DB4 #B41D62 #AEB41D #1DB46E

square

#231DB4 #B41D62 #AEB41D #1DB46E

split-complementary

#231DB4 #B46E1D #62B41D

monochromatic

#0F0C4B #19157F #231DB4 #3730DE #6A65E6

Accessibility & contrast

On white

11.02

#231DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#231DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231DB4

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231DB4	#FFFFFF	#000000	##FFFFFF
##231DB4	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B8

Deuteranopia (green-blind)

#0034B2

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #231db4;
/* rgb */ color: rgb(35, 29, 180);
/* oklch */ color: oklch(38.0% 0.220 270.6);

Tailwind

colors: {
  custom: {
    50: '#7a5ecc',
    500: '#231db4',
    950: '#000000',
  },
}

SCSS

$custom: #231db4;
$custom-light: #7a5ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#231db4",
  "rgb": {
    "r": 35,
    "g": 29,
    "b": 180
  },
  "hsl": {
    "h": 242.384,
    "s": 72.249,
    "l": 40.98
  },
  "oklch": {
    "l": 0.37973,
    "c": 0.22013,
    "h": 270.6
  },
  "luminance": 0.04531
}

Semantic roles & 50–950 ramp

primary

#231DB4

secondary

#C7CB61

accent

#EF39E8

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231DB4

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

Preview Lab → · Contrast checker → · Palette generator →