#313D8A#313D8A

#313D8A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.128 H 272.5°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#313D8A
RGB	rgb(49, 61, 138)
HSL	hsl(232, 48%, 37%)
HSV	hsv(232, 64%, 54%)
CMYK	cmyk(64.5%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(28.97, 20.84, -44.56)
CIE-LCH	lch(28.97, 49.19, 295.07°)
OKLab	oklab(39.57% 0.0056 -0.1279)
OKLCH	oklch(39.57% 0.128 272.5)
XYZ	xyz(7.5213, 5.8248, 24.7678)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D8A #8A7E31

analogous

#316A8A #313D8A #52318A

triadic

#313D8A #8A313D #3D8A31

tetradic

#313D8A #8A316A #8A7E31 #318A52

square

#313D8A #8A316A #8A7E31 #318A52

split-complementary

#313D8A #8A5231 #6A8A31

monochromatic

#111530 #21295D #313D8A #4151B7 #6B78CA

Accessibility & contrast

On white

9.70

#313D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#313D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D8A

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D8A	#FFFFFF	#000000	##FFFFFF
##313D8A	1.00	9.70	2.17	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06488D

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313d8a;
/* rgb */ color: rgb(49, 61, 138);
/* oklch */ color: oklch(39.6% 0.128 272.5);

Tailwind

colors: {
  custom: {
    50: '#7372ad',
    500: '#313d8a',
    950: '#000000',
  },
}

SCSS

$custom: #313d8a;
$custom-light: #7372ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313d8a",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 231.91,
    "s": 47.594,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39566,
    "c": 0.12804,
    "h": 272.5
  },
  "luminance": 0.05825
}

Semantic roles & 50–950 ramp

primary

#313D8A

secondary

#B2A865

accent

#C551D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313D8A

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

Preview Lab → · Contrast checker → · Palette generator →