#31319B#31319B

#31319B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.8% C 0.167 H 275.3°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#31319B
RGB	rgb(49, 49, 155)
HSL	hsl(240, 52%, 40%)
HSV	hsv(240, 68%, 61%)
CMYK	cmyk(68.4%, 68.4%, 0%, 39.2%)
CIE-LAB	lab(27.34, 34.83, -57.66)
CIE-LCH	lch(27.34, 67.36, 301.14°)
OKLab	oklab(38.81% 0.0155 -0.1665)
OKLCH	oklch(38.81% 0.167 275.3)
XYZ	xyz(8.2794, 5.2154, 31.5743)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31319B #9B9B31

analogous

#31669B #31319B #66319B

triadic

#31319B #9B3131 #319B31

tetradic

#31319B #9B3166 #9B9B31 #319B66

square

#31319B #9B3166 #9B9B31 #319B66

split-complementary

#31319B #9B6631 #669B31

monochromatic

#14143E #22226D #31319B #4545C4 #7373D3

Accessibility & contrast

On white

10.28

#31319B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#31319B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31319B

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31319B	#FFFFFF	#000000	##FFFFFF
##31319B	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459E

Deuteranopia (green-blind)

#003C99

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #31319b;
/* rgb */ color: rgb(49, 49, 155);
/* oklch */ color: oklch(38.8% 0.167 275.3);

Tailwind

colors: {
  custom: {
    50: '#786ab9',
    500: '#31319b',
    950: '#000000',
  },
}

SCSS

$custom: #31319b;
$custom-light: #786ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#31319b",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 155
  },
  "hsl": {
    "h": 240,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.3881,
    "c": 0.16719,
    "h": 275.3
  },
  "luminance": 0.05216
}

Semantic roles & 50–950 ramp

primary

#31319B

secondary

#BBBB6D

accent

#DB4CDB

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #31319B

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

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