#331F9D#331F9D

#331F9D is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.6% C 0.188 H 278.9°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#331F9D
RGB	rgb(51, 31, 157)
HSL	hsl(250, 67%, 37%)
HSV	hsv(250, 80%, 62%)
CMYK	cmyk(67.5%, 80.3%, 0%, 38.4%)
CIE-LAB	lab(24.06, 45.91, -64.28)
CIE-LCH	lch(24.06, 78.99, 305.54°)
OKLab	oklab(36.58% 0.029 -0.1856)
OKLCH	oklch(36.58% 0.188 278.9)
XYZ	xyz(7.9391, 4.1174, 32.2681)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331F9D #899D1F

analogous

#1F4A9D #331F9D #721F9D

triadic

#331F9D #9D331F #1F9D33

tetradic

#331F9D #9D1F4A #899D1F #1F9D72

square

#331F9D #9D1F4A #899D1F #1F9D72

split-complementary

#331F9D #9D721F #4A9D1F

monochromatic

#120B37 #22156A #331F9D #4429D0 #6E58DE

Accessibility & contrast

On white

11.52

#331F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#331F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331F9D

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331F9D	#FFFFFF	#000000	##FFFFFF
##331F9D	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA0

Deuteranopia (green-blind)

#00349B

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #331f9d;
/* rgb */ color: rgb(51, 31, 157);
/* oklch */ color: oklch(36.6% 0.188 278.9);

Tailwind

colors: {
  custom: {
    50: '#7b5fbb',
    500: '#331f9d',
    950: '#000000',
  },
}

SCSS

$custom: #331f9d;
$custom-light: #7b5fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#331f9d",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 157
  },
  "hsl": {
    "h": 249.524,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36577,
    "c": 0.1879,
    "h": 278.9
  },
  "luminance": 0.04118
}

Semantic roles & 50–950 ramp

primary

#331F9D

secondary

#B1C256

accent

#EA3ECF

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #331F9D

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

Preview Lab → · Contrast checker → · Palette generator →