#313D9E#313D9E

#313D9E is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.2% C 0.157 H 272.2°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#313D9E
RGB	rgb(49, 61, 158)
HSL	hsl(233, 53%, 41%)
HSV	hsv(233, 69%, 62%)
CMYK	cmyk(69%, 61.4%, 0%, 38%)
CIE-LAB	lab(30.54, 28.17, -54.25)
CIE-LCH	lch(30.54, 61.13, 297.45°)
OKLab	oklab(41.23% 0.0059 -0.1564)
OKLCH	oklch(41.23% 0.157 272.2)
XYZ	xyz(9.1048, 6.4582, 33.1079)
Luminance	0.0646 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D9E #9E9231

analogous

#31749E #313D9E #5B319E

triadic

#313D9E #9E313D #3D9E31

tetradic

#313D9E #9E3174 #9E9231 #319E5B

square

#313D9E #9E3174 #9E9231 #319E5B

split-complementary

#313D9E #9E5B31 #749E31

monochromatic

#141941 #232B6F #313D9E #4654C6 #7580D4

Accessibility & contrast

On white

9.16

#313D9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#313D9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D9E

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D9E	#FFFFFF	#000000	##FFFFFF
##313D9E	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA1

Deuteranopia (green-blind)

#00439C

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #313d9e;
/* rgb */ color: rgb(49, 61, 158);
/* oklch */ color: oklch(41.2% 0.157 272.2);

Tailwind

colors: {
  custom: {
    50: '#7772bb',
    500: '#313d9e',
    950: '#000000',
  },
}

SCSS

$custom: #313d9e;
$custom-light: #7772bb;
$custom-dark: #000000;

JSON

{
  "hex": "#313d9e",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 158
  },
  "hsl": {
    "h": 233.394,
    "s": 52.657,
    "l": 40.588
  },
  "oklch": {
    "l": 0.41234,
    "c": 0.15651,
    "h": 272.2
  },
  "luminance": 0.06459
}

Semantic roles & 50–950 ramp

primary

#313D9E

secondary

#BCB46E

accent

#CC4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313D9E

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

Preview Lab → · Contrast checker → · Palette generator →