#31379B#31379B

#31379B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.160 H 273.9°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#31379B
RGB	rgb(49, 55, 155)
HSL	hsl(237, 52%, 40%)
HSV	hsv(237, 68%, 61%)
CMYK	cmyk(68.4%, 64.5%, 0%, 39.2%)
CIE-LAB	lab(28.78, 31.01, -55.30)
CIE-LCH	lch(28.78, 63.41, 299.28°)
OKLab	oklab(39.86% 0.0109 -0.1596)
OKLCH	oklch(39.86% 0.16 273.9)
XYZ	xyz(8.5472, 5.7511, 31.6636)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31379B #9B9531

analogous

#316C9B #31379B #60319B

triadic

#31379B #9B3137 #379B31

tetradic

#31379B #9B316C #9B9531 #319B60

square

#31379B #9B316C #9B9531 #319B60

split-complementary

#31379B #9B6031 #6C9B31

monochromatic

#14163E #22266D #31379B #454CC4 #7379D3

Accessibility & contrast

On white

9.77

#31379B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#31379B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31379B

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31379B	#FFFFFF	#000000	##FFFFFF
##31379B	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005164

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #31379b;
/* rgb */ color: rgb(49, 55, 155);
/* oklch */ color: oklch(39.9% 0.160 273.9);

Tailwind

colors: {
  custom: {
    50: '#776eb9',
    500: '#31379b',
    950: '#000000',
  },
}

SCSS

$custom: #31379b;
$custom-light: #776eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#31379b",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 155
  },
  "hsl": {
    "h": 236.604,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.39856,
    "c": 0.15993,
    "h": 273.9
  },
  "luminance": 0.05752
}

Semantic roles & 50–950 ramp

primary

#31379B

secondary

#BBB66D

accent

#D34CDB

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #31379B

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

Preview Lab → · Contrast checker → · Palette generator →