#313CB4#313CB4

#313CB4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.187 H 271.7°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#313CB4
RGB	rgb(49, 60, 180)
HSL	hsl(235, 57%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(72.8%, 66.7%, 0%, 29.4%)
CIE-LAB	lab(32.21, 36.73, -64.71)
CIE-LCH	lch(32.21, 74.40, 299.58°)
OKLab	oklab(43.05% 0.0055 -0.1871)
OKLCH	oklch(43.05% 0.187 271.7)
XYZ	xyz(11.1179, 7.1788, 43.9709)
Luminance	0.0718 (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

#313CB4 #B4A931

analogous

#317DB4 #313CB4 #6831B4

triadic

#313CB4 #B4313C #3CB431

tetradic

#313CB4 #B4317D #B4A931 #31B468

square

#313CB4 #B4317D #B4A931 #31B468

split-complementary

#313CB4 #B46831 #7DB431

monochromatic

#171C54 #242C84 #313CB4 #525DD0 #828ADD

Accessibility & contrast

On white

8.62

#313CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#313CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313CB4

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313CB4	#FFFFFF	#000000	##FFFFFF
##313CB4	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B8

Deuteranopia (green-blind)

#0046B2

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313cb4;
/* rgb */ color: rgb(49, 60, 180);
/* oklch */ color: oklch(43.1% 0.187 271.7);

Tailwind

colors: {
  custom: {
    50: '#7c72cc',
    500: '#313cb4',
    950: '#000000',
  },
}

SCSS

$custom: #313cb4;
$custom-light: #7c72cc;
$custom-dark: #000000;

JSON

{
  "hex": "#313cb4",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 180
  },
  "hsl": {
    "h": 234.962,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43051,
    "c": 0.18716,
    "h": 271.7
  },
  "luminance": 0.0718
}

Semantic roles & 50–950 ramp

primary

#313CB4

secondary

#C6C07B

accent

#D447E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313CB4

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

Preview Lab → · Contrast checker → · Palette generator →