#331FB3#331FB3

#331FB3 is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 39.0% C 0.213 H 276.1°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#331FB3
RGB	rgb(51, 31, 179)
HSL	hsl(248, 70%, 41%)
HSV	hsv(248, 83%, 70%)
CMYK	cmyk(71.5%, 82.7%, 0%, 29.8%)
CIE-LAB	lab(26.56, 52.53, -73.44)
CIE-LCH	lch(26.56, 90.29, 305.57°)
OKLab	oklab(39.04% 0.0226 -0.2122)
OKLCH	oklch(39.04% 0.213 276.1)
XYZ	xyz(9.9892, 4.9375, 43.0657)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331FB3 #9FB31F

analogous

#1F55B3 #331FB3 #7D1FB3

triadic

#331FB3 #B3331F #1FB333

tetradic

#331FB3 #B31F55 #9FB31F #1FB37D

square

#331FB3 #B31F55 #9FB31F #1FB37D

split-complementary

#331FB3 #B37D1F #55B31F

monochromatic

#150D4B #24167F #331FB3 #4A33DC #7968E5

Accessibility & contrast

On white

10.57

#331FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#331FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331FB3

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331FB3	#FFFFFF	#000000	##FFFFFF
##331FB3	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B7

Deuteranopia (green-blind)

#0038B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #331fb3;
/* rgb */ color: rgb(51, 31, 179);
/* oklch */ color: oklch(39.0% 0.213 276.1);

Tailwind

colors: {
  custom: {
    50: '#7f60cb',
    500: '#331fb3',
    950: '#000000',
  },
}

SCSS

$custom: #331fb3;
$custom-light: #7f60cb;
$custom-dark: #000000;

JSON

{
  "hex": "#331fb3",
  "rgb": {
    "r": 51,
    "g": 31,
    "b": 179
  },
  "hsl": {
    "h": 248.108,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.3904,
    "c": 0.21345,
    "h": 276.1
  },
  "luminance": 0.04938
}

Semantic roles & 50–950 ramp

primary

#331FB3

secondary

#BCCA64

accent

#ED3BD5

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #331FB3

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

Preview Lab → · Contrast checker → · Palette generator →