#313FA6#313FA6

#313FA6 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.3% C 0.165 H 271.4°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#313FA6
RGB	rgb(49, 63, 166)
HSL	hsl(233, 54%, 42%)
HSV	hsv(233, 70%, 65%)
CMYK	cmyk(70.5%, 62%, 0%, 34.9%)
CIE-LAB	lab(31.72, 29.78, -57.16)
CIE-LCH	lch(31.72, 64.45, 297.52°)
OKLab	oklab(42.31% 0.0042 -0.1649)
OKLCH	oklch(42.31% 0.165 271.4)
XYZ	xyz(9.9247, 6.9602, 36.8894)
Luminance	0.0696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FA6 #A69831

analogous

#3179A6 #313FA6 #5E31A6

triadic

#313FA6 #A6313F #3FA631

tetradic

#313FA6 #A63179 #A69831 #31A65E

square

#313FA6 #A63179 #A69831 #31A65E

split-complementary

#313FA6 #A65E31 #79A631

monochromatic

#151B47 #232D77 #313FA6 #4A5ACA #7A85D8

Accessibility & contrast

On white

8.78

#313FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#313FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FA6

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FA6	#FFFFFF	#000000	##FFFFFF
##313FA6	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A9

Deuteranopia (green-blind)

#0045A4

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313fa6;
/* rgb */ color: rgb(49, 63, 166);
/* oklch */ color: oklch(42.3% 0.165 271.4);

Tailwind

colors: {
  custom: {
    50: '#7974c1',
    500: '#313fa6',
    950: '#000000',
  },
}

SCSS

$custom: #313fa6;
$custom-light: #7974c1;
$custom-dark: #000000;

JSON

{
  "hex": "#313fa6",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 232.821,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42311,
    "c": 0.16498,
    "h": 271.4
  },
  "luminance": 0.06961
}

Semantic roles & 50–950 ramp

primary

#313FA6

secondary

#C0B773

accent

#CC4ADE

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313FA6

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

Preview Lab → · Contrast checker → · Palette generator →