#311E9D#311E9D

#311E9D is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.3% C 0.189 H 278.1°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#311E9D
RGB	rgb(49, 30, 157)
HSL	hsl(249, 68%, 37%)
HSV	hsv(249, 81%, 62%)
CMYK	cmyk(68.8%, 80.9%, 0%, 38.4%)
CIE-LAB	lab(23.72, 46.20, -64.84)
CIE-LCH	lch(23.72, 79.62, 305.47°)
OKLab	oklab(36.3% 0.0266 -0.1873)
OKLCH	oklch(36.3% 0.189 278.1)
XYZ	xyz(7.8147, 4.0152, 32.2549)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311E9D #8A9D1E

analogous

#1E4B9D #311E9D #711E9D

triadic

#311E9D #9D311E #1E9D31

tetradic

#311E9D #9D1E4B #8A9D1E #1E9D71

square

#311E9D #9D1E4B #8A9D1E #1E9D71

split-complementary

#311E9D #9D711E #4B9D1E

monochromatic

#110A36 #21146A #311E9D #4128D0 #6B57DF

Accessibility & contrast

On white

11.65

#311E9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#311E9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311E9D

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311E9D	#FFFFFF	#000000	##FFFFFF
##311E9D	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA0

Deuteranopia (green-blind)

#00339B

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311e9d;
/* rgb */ color: rgb(49, 30, 157);
/* oklch */ color: oklch(36.3% 0.189 278.1);

Tailwind

colors: {
  custom: {
    50: '#7a5ebb',
    500: '#311e9d',
    950: '#000000',
  },
}

SCSS

$custom: #311e9d;
$custom-light: #7a5ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#311e9d",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 157
  },
  "hsl": {
    "h": 248.976,
    "s": 67.914,
    "l": 36.667
  },
  "oklch": {
    "l": 0.36303,
    "c": 0.18918,
    "h": 278.1
  },
  "luminance": 0.04016
}

Semantic roles & 50–950 ramp

primary

#311E9D

secondary

#B2C254

accent

#EB3DD1

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311E9D

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

Preview Lab → · Contrast checker → · Palette generator →