#313D71#313D71

#313D71 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.090 H 271.7°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#313D71
RGB	rgb(49, 61, 113)
HSL	hsl(229, 40%, 32%)
HSV	hsv(229, 57%, 44%)
CMYK	cmyk(56.6%, 46%, 0%, 55.7%)
CIE-LAB	lab(27.25, 11.73, -31.65)
CIE-LCH	lch(27.25, 33.75, 290.33°)
OKLab	oklab(37.71% 0.0027 -0.09)
OKLCH	oklch(37.71% 0.09 271.7)
XYZ	xyz(5.9150, 5.1823, 16.3082)
Luminance	0.0518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D71 #716531

analogous

#315D71 #313D71 #453171

triadic

#313D71 #71313D #3D7131

tetradic

#313D71 #71315D #716531 #317145

square

#313D71 #71315D #716531 #317145

split-complementary

#313D71 #714531 #5D7131

monochromatic

#0C0F1C #1E2646 #313D71 #44549C #6272BB

Accessibility & contrast

On white

10.31

#313D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#313D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D71

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D71	#FFFFFF	#000000	##FFFFFF
##313D71	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274373

Deuteranopia (green-blind)

#1F3E70

Tritanopia (blue-blind)

#114851

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #313d71;
/* rgb */ color: rgb(49, 61, 113);
/* oklch */ color: oklch(37.7% 0.090 271.7);

Tailwind

colors: {
  custom: {
    50: '#6e729a',
    500: '#313d71',
    950: '#000000',
  },
}

SCSS

$custom: #313d71;
$custom-light: #6e729a;
$custom-dark: #000000;

JSON

{
  "hex": "#313d71",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 113
  },
  "hsl": {
    "h": 228.75,
    "s": 39.506,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37714,
    "c": 0.09,
    "h": 271.7
  },
  "luminance": 0.05183
}

Semantic roles & 50–950 ramp

primary

#313D71

secondary

#A2955C

accent

#B958CF

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #313D71

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

Preview Lab → · Contrast checker → · Palette generator →