#313D9D#313D9D

#313D9D is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.155 H 272.2°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#313D9D
RGB	rgb(49, 61, 157)
HSL	hsl(233, 52%, 40%)
HSV	hsv(233, 69%, 62%)
CMYK	cmyk(68.8%, 61.1%, 0%, 38.4%)
CIE-LAB	lab(30.46, 27.81, -53.78)
CIE-LCH	lch(30.46, 60.54, 297.35°)
OKLab	oklab(41.15% 0.0059 -0.155)
OKLCH	oklch(41.15% 0.155 272.2)
XYZ	xyz(9.0191, 6.4239, 32.6564)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D9D #9D9131

analogous

#31739D #313D9D #5B319D

triadic

#313D9D #9D313D #3D9D31

tetradic

#313D9D #9D3173 #9D9131 #319D5B

square

#313D9D #9D3173 #9D9131 #319D5B

split-complementary

#313D9D #9D5B31 #739D31

monochromatic

#141940 #222B6E #313D9D #4654C5 #757FD4

Accessibility & contrast

On white

9.19

#313D9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#313D9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D9D

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D9D	#FFFFFF	#000000	##FFFFFF
##313D9D	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA0

Deuteranopia (green-blind)

#00439B

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #313d9d;
/* rgb */ color: rgb(49, 61, 157);
/* oklch */ color: oklch(41.1% 0.155 272.2);

Tailwind

colors: {
  custom: {
    50: '#7772bb',
    500: '#313d9d',
    950: '#000000',
  },
}

SCSS

$custom: #313d9d;
$custom-light: #7772bb;
$custom-dark: #000000;

JSON

{
  "hex": "#313d9d",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 157
  },
  "hsl": {
    "h": 233.333,
    "s": 52.427,
    "l": 40.392
  },
  "oklch": {
    "l": 0.41147,
    "c": 0.15513,
    "h": 272.2
  },
  "luminance": 0.06425
}

Semantic roles & 50–950 ramp

primary

#313D9D

secondary

#BCB36E

accent

#CC4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313D9D

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

Preview Lab → · Contrast checker → · Palette generator →