#31337C#31337C

#31337C is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.121 H 277.3°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#31337C
RGB	rgb(49, 51, 124)
HSL	hsl(238, 43%, 34%)
HSV	hsv(238, 60%, 49%)
CMYK	cmyk(60.5%, 58.9%, 0%, 51.4%)
CIE-LAB	lab(25.18, 22.53, -41.93)
CIE-LCH	lch(25.18, 47.60, 298.25°)
OKLab	oklab(36.4% 0.0155 -0.1203)
OKLCH	oklch(36.4% 0.121 277.3)
XYZ	xyz(6.0874, 4.4754, 19.6079)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31337C #7C7A31

analogous

#31597C #31337C #55317C

triadic

#31337C #7C3133 #337C31

tetradic

#31337C #7C3159 #7C7A31 #317C55

square

#31337C #7C3159 #7C7A31 #317C55

split-complementary

#31337C #7C5531 #597C31

monochromatic

#0E0F24 #202150 #31337C #4245A8 #6568C2

Accessibility & contrast

On white

11.08

#31337C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#31337C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31337C

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31337C	#FFFFFF	#000000	##FFFFFF
##31337C	1.00	11.08	1.90	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F7E

Deuteranopia (green-blind)

#00397B

Tritanopia (blue-blind)

#004452

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #31337c;
/* rgb */ color: rgb(49, 51, 124);
/* oklch */ color: oklch(36.4% 0.121 277.3);

Tailwind

colors: {
  custom: {
    50: '#716aa2',
    500: '#31337c',
    950: '#000000',
  },
}

SCSS

$custom: #31337c;
$custom-light: #716aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#31337c",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 124
  },
  "hsl": {
    "h": 238.4,
    "s": 43.353,
    "l": 33.922
  },
  "oklch": {
    "l": 0.36404,
    "c": 0.1213,
    "h": 277.3
  },
  "luminance": 0.04476
}

Semantic roles & 50–950 ramp

primary

#31337C

secondary

#AAA85F

accent

#D055D3

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #31337C

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

Preview Lab → · Contrast checker → · Palette generator →