#313DB5#313DB5

#313DB5 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.187 H 271.5°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#313DB5
RGB	rgb(49, 61, 181)
HSL	hsl(235, 57%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(72.9%, 66.3%, 0%, 29%)
CIE-LAB	lab(32.54, 36.45, -64.77)
CIE-LCH	lch(32.54, 74.32, 299.37°)
OKLab	oklab(43.32% 0.0047 -0.1872)
OKLCH	oklch(43.32% 0.187 271.5)
XYZ	xyz(11.2730, 7.3255, 44.5270)
Luminance	0.0733 (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

#313DB5 #B5A931

analogous

#317FB5 #313DB5 #6731B5

triadic

#313DB5 #B5313D #3DB531

tetradic

#313DB5 #B5317F #B5A931 #31B567

square

#313DB5 #B5317F #B5A931 #31B567

split-complementary

#313DB5 #B56731 #7FB531

monochromatic

#171D55 #242D85 #313DB5 #535ED0 #838BDD

Accessibility & contrast

On white

8.52

#313DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#313DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DB5

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DB5	#FFFFFF	#000000	##FFFFFF
##313DB5	1.00	8.52	2.47	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313db5;
/* rgb */ color: rgb(49, 61, 181);
/* oklch */ color: oklch(43.3% 0.187 271.5);

Tailwind

colors: {
  custom: {
    50: '#7c73cc',
    500: '#313db5',
    950: '#000000',
  },
}

SCSS

$custom: #313db5;
$custom-light: #7c73cc;
$custom-dark: #000000;

JSON

{
  "hex": "#313db5",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 181
  },
  "hsl": {
    "h": 234.545,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43317,
    "c": 0.1873,
    "h": 271.5
  },
  "luminance": 0.07327
}

Semantic roles & 50–950 ramp

primary

#313DB5

secondary

#C7C07B

accent

#D347E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313DB5

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

Preview Lab → · Contrast checker → · Palette generator →