#311E9B#311E9B

#311E9B is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.1% C 0.187 H 278.4°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#311E9B
RGB	rgb(49, 30, 155)
HSL	hsl(249, 68%, 36%)
HSV	hsv(249, 81%, 61%)
CMYK	cmyk(68.4%, 80.6%, 0%, 39.2%)
CIE-LAB	lab(23.50, 45.59, -63.99)
CIE-LCH	lch(23.50, 78.57, 305.47°)
OKLab	oklab(36.08% 0.0271 -0.1848)
OKLCH	oklch(36.08% 0.187 278.4)
XYZ	xyz(7.6454, 3.9474, 31.3630)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311E9B #889B1E

analogous

#1E4A9B #311E9B #701E9B

triadic

#311E9B #9B311E #1E9B31

tetradic

#311E9B #9B1E4A #889B1E #1E9B70

square

#311E9B #9B1E4A #889B1E #1E9B70

split-complementary

#311E9B #9B701E #4A9B1E

monochromatic

#110A34 #211468 #311E9B #4128CE #6A55DE

Accessibility & contrast

On white

11.73

#311E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#311E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311E9B

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311E9B	#FFFFFF	#000000	##FFFFFF
##311E9B	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9E

Deuteranopia (green-blind)

#003399

Tritanopia (blue-blind)

#00445D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311e9b;
/* rgb */ color: rgb(49, 30, 155);
/* oklch */ color: oklch(36.1% 0.187 278.4);

Tailwind

colors: {
  custom: {
    50: '#795eba',
    500: '#311e9b',
    950: '#000000',
  },
}

SCSS

$custom: #311e9b;
$custom-light: #795eba;
$custom-dark: #000000;

JSON

{
  "hex": "#311e9b",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 155
  },
  "hsl": {
    "h": 249.12,
    "s": 67.568,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36081,
    "c": 0.18681,
    "h": 278.4
  },
  "luminance": 0.03948
}

Semantic roles & 50–950 ramp

primary

#311E9B

secondary

#B1C253

accent

#EA3DD0

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #311E9B

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

Preview Lab → · Contrast checker → · Palette generator →