#331DB3#331DB3

#331DB3 is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.8% C 0.215 H 276.2°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#331DB3
RGB	rgb(51, 29, 179)
HSL	hsl(249, 72%, 41%)
HSV	hsv(249, 84%, 70%)
CMYK	cmyk(71.5%, 83.8%, 0%, 29.8%)
CIE-LAB	lab(26.26, 53.39, -73.92)
CIE-LCH	lch(26.26, 91.19, 305.84°)
OKLab	oklab(38.84% 0.0233 -0.2136)
OKLCH	oklch(38.84% 0.215 276.2)
XYZ	xyz(9.9386, 4.8363, 43.0488)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331DB3 #9DB31D

analogous

#1D52B3 #331DB3 #7E1DB3

triadic

#331DB3 #B3331D #1DB333

tetradic

#331DB3 #B31D52 #9DB31D #1DB37E

square

#331DB3 #B31D52 #9DB31D #1DB37E

split-complementary

#331DB3 #B37E1D #52B31D

monochromatic

#150C4A #24147E #331DB3 #4930DD #7764E6

Accessibility & contrast

On white

10.67

#331DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#331DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331DB3

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331DB3	#FFFFFF	#000000	##FFFFFF
##331DB3	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0038B0

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #331db3;
/* rgb */ color: rgb(51, 29, 179);
/* oklch */ color: oklch(38.8% 0.215 276.2);

Tailwind

colors: {
  custom: {
    50: '#7f5fcb',
    500: '#331db3',
    950: '#000000',
  },
}

SCSS

$custom: #331db3;
$custom-light: #7f5fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#331db3",
  "rgb": {
    "r": 51,
    "g": 29,
    "b": 179
  },
  "hsl": {
    "h": 248.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38838,
    "c": 0.21489,
    "h": 276.2
  },
  "luminance": 0.04837
}

Semantic roles & 50–950 ramp

primary

#331DB3

secondary

#BBCB61

accent

#EF39D4

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #331DB3

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

Preview Lab → · Contrast checker → · Palette generator →