#31337D#31337D

#31337D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.5% C 0.123 H 277.3°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#31337D
RGB	rgb(49, 51, 125)
HSL	hsl(238, 44%, 34%)
HSV	hsv(238, 61%, 49%)
CMYK	cmyk(60.8%, 59.2%, 0%, 51%)
CIE-LAB	lab(25.26, 22.89, -42.44)
CIE-LCH	lch(25.26, 48.22, 298.34°)
OKLab	oklab(36.49% 0.0155 -0.1218)
OKLCH	oklch(36.49% 0.123 277.3)
XYZ	xyz(6.1509, 4.5008, 19.9427)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31337D #7D7B31

analogous

#31597D #31337D #55317D

triadic

#31337D #7D3133 #337D31

tetradic

#31337D #7D3159 #7D7B31 #317D55

square

#31337D #7D3159 #7D7B31 #317D55

split-complementary

#31337D #7D5531 #597D31

monochromatic

#0F0F25 #202151 #31337D #4245A9 #6668C3

Accessibility & contrast

On white

11.05

#31337D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#31337D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31337D

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31337D	#FFFFFF	#000000	##FFFFFF
##31337D	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F7F

Deuteranopia (green-blind)

#00397B

Tritanopia (blue-blind)

#004552

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #31337d;
/* rgb */ color: rgb(49, 51, 125);
/* oklch */ color: oklch(36.5% 0.123 277.3);

Tailwind

colors: {
  custom: {
    50: '#716aa3',
    500: '#31337d',
    950: '#000000',
  },
}

SCSS

$custom: #31337d;
$custom-light: #716aa3;
$custom-dark: #000000;

JSON

{
  "hex": "#31337d",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 125
  },
  "hsl": {
    "h": 238.421,
    "s": 43.678,
    "l": 34.118
  },
  "oklch": {
    "l": 0.36487,
    "c": 0.12277,
    "h": 277.3
  },
  "luminance": 0.04501
}

Semantic roles & 50–950 ramp

primary

#31337D

secondary

#AAA860

accent

#D054D3

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #31337D

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

Preview Lab → · Contrast checker → · Palette generator →