#313DB1#313DB1

#313DB1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.9% C 0.182 H 271.6°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#313DB1
RGB	rgb(49, 61, 177)
HSL	hsl(234, 57%, 44%)
HSV	hsv(234, 72%, 69%)
CMYK	cmyk(72.3%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(32.18, 35.03, -62.98)
CIE-LCH	lch(32.18, 72.07, 299.08°)
OKLab	oklab(42.94% 0.005 -0.182)
OKLCH	oklch(42.94% 0.182 271.6)
XYZ	xyz(10.8685, 7.1637, 42.3964)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313DB1 #B1A531

analogous

#317DB1 #313DB1 #6531B1

triadic

#313DB1 #B1313D #3DB131

tetradic

#313DB1 #B1317D #B1A531 #31B165

square

#313DB1 #B1317D #B1A531 #31B165

split-complementary

#313DB1 #B16531 #7DB131

monochromatic

#161C51 #242C81 #313DB1 #515CCF #8089DC

Accessibility & contrast

On white

8.63

#313DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#313DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DB1

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DB1	#FFFFFF	#000000	##FFFFFF
##313DB1	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313db1;
/* rgb */ color: rgb(49, 61, 177);
/* oklch */ color: oklch(42.9% 0.182 271.6);

Tailwind

colors: {
  custom: {
    50: '#7c72c9',
    500: '#313db1',
    950: '#000000',
  },
}

SCSS

$custom: #313db1;
$custom-light: #7c72c9;
$custom-dark: #000000;

JSON

{
  "hex": "#313db1",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 234.375,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.42944,
    "c": 0.18209,
    "h": 271.6
  },
  "luminance": 0.07165
}

Semantic roles & 50–950 ramp

primary

#313DB1

secondary

#C5BE79

accent

#D248E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313DB1

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

Preview Lab → · Contrast checker → · Palette generator →