#231B79#231B79

#231B79 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.8% C 0.151 H 276.7°. Best body text is #FFFFFF at 13.96:1 contrast (WCAG AA passes).

Color values

HEX	#231B79
RGB	rgb(35, 27, 121)
HSL	hsl(245, 64%, 29%)
HSV	hsv(245, 78%, 47%)
CMYK	cmyk(71.1%, 77.7%, 0%, 52.5%)
CIE-LAB	lab(18.01, 34.74, -51.79)
CIE-LCH	lch(18.01, 62.36, 303.85°)
OKLab	oklab(30.83% 0.0175 -0.1497)
OKLCH	oklch(30.83% 0.151 276.7)
XYZ	xyz(4.5351, 2.5213, 18.3331)
Luminance	0.0252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B79 #71791B

analogous

#1B4279 #231B79 #521B79

triadic

#231B79 #79231B #1B7923

tetradic

#231B79 #791B42 #71791B #1B7952

square

#231B79 #791B42 #71791B #1B7952

split-complementary

#231B79 #79521B #42791B

monochromatic

#070619 #151047 #231B79 #3126AB #483BD3

Accessibility & contrast

On white

13.96

#231B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#231B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B79

13.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B79	#FFFFFF	#000000	##FFFFFF
##231B79	1.00	13.96	1.50	13.96
#FFFFFF	13.96	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307C

Deuteranopia (green-blind)

#002877

Tritanopia (blue-blind)

#003649

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #231b79;
/* rgb */ color: rgb(35, 27, 121);
/* oklch */ color: oklch(30.8% 0.151 276.7);

Tailwind

colors: {
  custom: {
    50: '#6c59a1',
    500: '#231b79',
    950: '#000000',
  },
}

SCSS

$custom: #231b79;
$custom-light: #6c59a1;
$custom-dark: #000000;

JSON

{
  "hex": "#231b79",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 121
  },
  "hsl": {
    "h": 245.106,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30829,
    "c": 0.15068,
    "h": 276.7
  },
  "luminance": 0.02522
}

Semantic roles & 50–950 ramp

primary

#231B79

secondary

#A4AD43

accent

#E741D8

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#08030F

muted

#7A787F

Preview Lab

Preview with #231B79

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

Preview Lab → · Contrast checker → · Palette generator →