#331AB4#331AB4

#331AB4 is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.7% C 0.218 H 276.3°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#331AB4
RGB	rgb(51, 26, 180)
HSL	hsl(250, 75%, 40%)
HSV	hsv(250, 86%, 71%)
CMYK	cmyk(71.7%, 85.6%, 0%, 29.4%)
CIE-LAB	lab(25.97, 54.90, -75.00)
CIE-LCH	lch(25.97, 92.95, 306.20°)
OKLab	oklab(38.67% 0.0239 -0.2167)
OKLCH	oklch(38.67% 0.218 276.3)
XYZ	xyz(9.9702, 4.7369, 43.5601)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331AB4 #9BB41A

analogous

#1A4EB4 #331AB4 #801AB4

triadic

#331AB4 #B4331A #1AB433

tetradic

#331AB4 #B41A4E #9BB41A #1AB480

square

#331AB4 #B41A4E #9BB41A #1AB480

split-complementary

#331AB4 #B4801A #4EB41A

monochromatic

#150B49 #24127F #331AB4 #482BE0 #7660E8

Accessibility & contrast

On white

10.78

#331AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#331AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331AB4

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331AB4	#FFFFFF	#000000	##FFFFFF
##331AB4	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B8

Deuteranopia (green-blind)

#0037B1

Tritanopia (blue-blind)

#004D6B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #331ab4;
/* rgb */ color: rgb(51, 26, 180);
/* oklch */ color: oklch(38.7% 0.218 276.3);

Tailwind

colors: {
  custom: {
    50: '#805ecc',
    500: '#331ab4',
    950: '#000000',
  },
}

SCSS

$custom: #331ab4;
$custom-light: #805ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#331ab4",
  "rgb": {
    "r": 51,
    "g": 26,
    "b": 180
  },
  "hsl": {
    "h": 249.74,
    "s": 74.757,
    "l": 40.392
  },
  "oklch": {
    "l": 0.38673,
    "c": 0.21802,
    "h": 276.3
  },
  "luminance": 0.04738
}

Semantic roles & 50–950 ramp

primary

#331AB4

secondary

#BACC5D

accent

#F136D3

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #331AB4

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

Preview Lab → · Contrast checker → · Palette generator →