#313CA8#313CA8

#313CA8 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.171 H 272.1°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#313CA8
RGB	rgb(49, 60, 168)
HSL	hsl(234, 55%, 43%)
HSV	hsv(234, 71%, 66%)
CMYK	cmyk(70.8%, 64.3%, 0%, 34.1%)
CIE-LAB	lab(31.14, 32.45, -59.30)
CIE-LCH	lch(31.14, 67.60, 298.68°)
OKLab	oklab(41.94% 0.0063 -0.1712)
OKLCH	oklch(41.94% 0.171 272.1)
XYZ	xyz(9.9480, 6.7109, 37.8093)
Luminance	0.0671 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313CA8 #A89D31

analogous

#3177A8 #313CA8 #6231A8

triadic

#313CA8 #A8313C #3CA831

tetradic

#313CA8 #A83177 #A89D31 #31A862

square

#313CA8 #A83177 #A89D31 #31A862

split-complementary

#313CA8 #A86231 #77A831

monochromatic

#151A49 #232B79 #313CA8 #4C57CB #7B84D8

Accessibility & contrast

On white

8.97

#313CA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#313CA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313CA8

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313CA8	#FFFFFF	#000000	##FFFFFF
##313CA8	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0044A6

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313ca8;
/* rgb */ color: rgb(49, 60, 168);
/* oklch */ color: oklch(41.9% 0.171 272.1);

Tailwind

colors: {
  custom: {
    50: '#7a72c3',
    500: '#313ca8',
    950: '#000000',
  },
}

SCSS

$custom: #313ca8;
$custom-light: #7a72c3;
$custom-dark: #000000;

JSON

{
  "hex": "#313ca8",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 168
  },
  "hsl": {
    "h": 234.454,
    "s": 54.839,
    "l": 42.549
  },
  "oklch": {
    "l": 0.41939,
    "c": 0.17136,
    "h": 272.1
  },
  "luminance": 0.06712
}

Semantic roles & 50–950 ramp

primary

#313CA8

secondary

#C1BA74

accent

#D04ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #313CA8

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

Preview Lab → · Contrast checker → · Palette generator →