#313C81#313C81

#313C81 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.7% C 0.116 H 273.0°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#313C81
RGB	rgb(49, 60, 129)
HSL	hsl(232, 45%, 35%)
HSV	hsv(232, 62%, 51%)
CMYK	cmyk(62%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(28.03, 18.22, -40.47)
CIE-LCH	lch(28.03, 44.39, 294.24°)
OKLab	oklab(38.65% 0.006 -0.1159)
OKLCH	oklch(38.65% 0.116 273)
XYZ	xyz(6.8436, 5.4691, 21.4596)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C81 #817631

analogous

#316481 #313C81 #4E3181

triadic

#313C81 #81313C #3C8131

tetradic

#313C81 #813164 #817631 #31814E

square

#313C81 #813164 #817631 #31814E

split-complementary

#313C81 #814E31 #648131

monochromatic

#0F1328 #202755 #313C81 #4251AD #6774C5

Accessibility & contrast

On white

10.03

#313C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#313C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C81

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C81	#FFFFFF	#000000	##FFFFFF
##313C81	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154683

Deuteranopia (green-blind)

#003F80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313c81;
/* rgb */ color: rgb(49, 60, 129);
/* oklch */ color: oklch(38.7% 0.116 273.0);

Tailwind

colors: {
  custom: {
    50: '#7171a6',
    500: '#313c81',
    950: '#000000',
  },
}

SCSS

$custom: #313c81;
$custom-light: #7171a6;
$custom-dark: #000000;

JSON

{
  "hex": "#313c81",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 231.75,
    "s": 44.944,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38654,
    "c": 0.11606,
    "h": 273
  },
  "luminance": 0.0547
}

Semantic roles & 50–950 ramp

primary

#313C81

secondary

#ADA261

accent

#C353D5

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #313C81

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

Preview Lab → · Contrast checker → · Palette generator →