#231B7D#231B7D

#231B7D is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.3% C 0.156 H 276.1°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#231B7D
RGB	rgb(35, 27, 125)
HSL	hsl(245, 64%, 30%)
HSV	hsv(245, 78%, 49%)
CMYK	cmyk(72%, 78.4%, 0%, 51%)
CIE-LAB	lab(18.46, 36.10, -53.61)
CIE-LCH	lch(18.46, 64.63, 303.95°)
OKLab	oklab(31.28% 0.0165 -0.155)
OKLCH	oklch(31.28% 0.156 276.1)
XYZ	xyz(4.7855, 2.6214, 19.6518)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B7D #757D1B

analogous

#1B447D #231B7D #541B7D

triadic

#231B7D #7D231B #1B7D23

tetradic

#231B7D #7D1B44 #757D1B #1B7D54

square

#231B7D #7D1B44 #757D1B #1B7D54

split-complementary

#231B7D #7D541B #447D1B

monochromatic

#070519 #15104B #231B7D #3126AF #4A3DD5

Accessibility & contrast

On white

13.78

#231B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#231B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B7D

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B7D	#FFFFFF	#000000	##FFFFFF
##231B7D	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003180

Deuteranopia (green-blind)

#00297B

Tritanopia (blue-blind)

#00384B

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #231b7d;
/* rgb */ color: rgb(35, 27, 125);
/* oklch */ color: oklch(31.3% 0.156 276.1);

Tailwind

colors: {
  custom: {
    50: '#6d59a4',
    500: '#231b7d',
    950: '#000000',
  },
}

SCSS

$custom: #231b7d;
$custom-light: #6d59a4;
$custom-dark: #000000;

JSON

{
  "hex": "#231b7d",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 125
  },
  "hsl": {
    "h": 244.898,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31275,
    "c": 0.15586,
    "h": 276.1
  },
  "luminance": 0.02622
}

Semantic roles & 50–950 ramp

primary

#231B7D

secondary

#A8B143

accent

#E740DA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #231B7D

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

Preview Lab → · Contrast checker → · Palette generator →