#31338C#31338C

#31338C is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.8% C 0.144 H 276.0°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#31338C
RGB	rgb(49, 51, 140)
HSL	hsl(239, 48%, 37%)
HSV	hsv(239, 65%, 55%)
CMYK	cmyk(65%, 63.6%, 0%, 45.1%)
CIE-LAB	lab(26.49, 28.26, -49.83)
CIE-LCH	lch(26.49, 57.28, 299.56°)
OKLab	oklab(37.78% 0.0152 -0.1435)
OKLCH	oklch(37.78% 0.144 276)
XYZ	xyz(7.1825, 4.9135, 25.3758)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31338C #8C8A31

analogous

#31618C #31338C #5C318C

triadic

#31338C #8C3133 #338C31

tetradic

#31338C #8C3161 #8C8A31 #318C5C

square

#31338C #8C3161 #8C8A31 #318C5C

split-complementary

#31338C #8C5C31 #618C31

monochromatic

#111231 #21225F #31338C #4144B9 #6C6ECC

Accessibility & contrast

On white

10.59

#31338C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#31338C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31338C

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31338C	#FFFFFF	#000000	##FFFFFF
##31338C	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438F

Deuteranopia (green-blind)

#003B8A

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #31338c;
/* rgb */ color: rgb(49, 51, 140);
/* oklch */ color: oklch(37.8% 0.144 276.0);

Tailwind

colors: {
  custom: {
    50: '#746bae',
    500: '#31338c',
    950: '#000000',
  },
}

SCSS

$custom: #31338c;
$custom-light: #746bae;
$custom-dark: #000000;

JSON

{
  "hex": "#31338c",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 140
  },
  "hsl": {
    "h": 238.681,
    "s": 48.148,
    "l": 37.059
  },
  "oklch": {
    "l": 0.37775,
    "c": 0.14431,
    "h": 276
  },
  "luminance": 0.04914
}

Semantic roles & 50–950 ramp

primary

#31338C

secondary

#B3B166

accent

#D550D8

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #31338C

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

Preview Lab → · Contrast checker → · Palette generator →