#313C78#313C78

#313C78 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 38.0% C 0.102 H 272.8°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#313C78
RGB	rgb(49, 60, 120)
HSL	hsl(231, 42%, 33%)
HSV	hsv(231, 59%, 47%)
CMYK	cmyk(59.2%, 50%, 0%, 52.9%)
CIE-LAB	lab(27.41, 14.94, -35.82)
CIE-LCH	lch(27.41, 38.81, 292.64°)
OKLab	oklab(37.98% 0.005 -0.1022)
OKLCH	oklch(37.98% 0.102 272.8)
XYZ	xyz(6.2715, 5.2403, 18.4466)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C78 #786D31

analogous

#315F78 #313C78 #493178

triadic

#313C78 #78313C #3C7831

tetradic

#313C78 #78315F #786D31 #317849

square

#313C78 #78315F #786D31 #317849

split-complementary

#313C78 #784931 #5F7831

monochromatic

#0E1121 #1F264D #313C78 #4352A3 #6472C0

Accessibility & contrast

On white

10.25

#313C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#313C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C78

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C78	#FFFFFF	#000000	##FFFFFF
##313C78	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F447A

Deuteranopia (green-blind)

#153E77

Tritanopia (blue-blind)

#054954

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #313c78;
/* rgb */ color: rgb(49, 60, 120);
/* oklch */ color: oklch(38.0% 0.102 272.8);

Tailwind

colors: {
  custom: {
    50: '#70719f',
    500: '#313c78',
    950: '#000000',
  },
}

SCSS

$custom: #313c78;
$custom-light: #70719f;
$custom-dark: #000000;

JSON

{
  "hex": "#313c78",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 120
  },
  "hsl": {
    "h": 230.704,
    "s": 42.012,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37983,
    "c": 0.10236,
    "h": 272.8
  },
  "luminance": 0.05241
}

Semantic roles & 50–950 ramp

primary

#313C78

secondary

#A79C5E

accent

#BF56D2

background

#F7F6F9

surface

#EDECF2

border

#C8C7CC

text

#08070E

muted

#7B7A7E

Preview Lab

Preview with #313C78

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

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