#311F9E#311F9E

#311F9E is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.5% C 0.190 H 277.8°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#311F9E
RGB	rgb(49, 31, 158)
HSL	hsl(249, 67%, 37%)
HSV	hsv(249, 80%, 62%)
CMYK	cmyk(69%, 80.4%, 0%, 38%)
CIE-LAB	lab(24.00, 46.02, -64.99)
CIE-LCH	lch(24.00, 79.63, 305.31°)
OKLab	oklab(36.53% 0.0258 -0.1877)
OKLCH	oklch(36.53% 0.19 277.8)
XYZ	xyz(7.9262, 4.1009, 32.7150)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F9E #8C9E1F

analogous

#1F4D9E #311F9E #711F9E

triadic

#311F9E #9E311F #1F9E31

tetradic

#311F9E #9E1F4D #8C9E1F #1F9E71

square

#311F9E #9E1F4D #8C9E1F #1F9E71

split-complementary

#311F9E #9E711F #4D9E1F

monochromatic

#110B38 #21156B #311F9E #4129D1 #6C59DE

Accessibility & contrast

On white

11.54

#311F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#311F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F9E

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F9E	#FFFFFF	#000000	##FFFFFF
##311F9E	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA2

Deuteranopia (green-blind)

#00349C

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #311f9e;
/* rgb */ color: rgb(49, 31, 158);
/* oklch */ color: oklch(36.5% 0.190 277.8);

Tailwind

colors: {
  custom: {
    50: '#7a5fbc',
    500: '#311f9e',
    950: '#000000',
  },
}

SCSS

$custom: #311f9e;
$custom-light: #7a5fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#311f9e",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 158
  },
  "hsl": {
    "h": 248.504,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.36531,
    "c": 0.18951,
    "h": 277.8
  },
  "luminance": 0.04102
}

Semantic roles & 50–950 ramp

primary

#311F9E

secondary

#B3C256

accent

#EA3ED2

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311F9E

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

Preview Lab → · Contrast checker → · Palette generator →