#313F87#313F87

#313F87 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.8% C 0.121 H 271.6°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#313F87
RGB	rgb(49, 63, 135)
HSL	hsl(230, 47%, 36%)
HSV	hsv(230, 64%, 53%)
CMYK	cmyk(63.7%, 53.3%, 0%, 47.1%)
CIE-LAB	lab(29.30, 18.38, -42.16)
CIE-LCH	lch(29.30, 45.99, 293.56°)
OKLab	oklab(39.75% 0.0033 -0.1208)
OKLCH	oklch(39.75% 0.121 271.6)
XYZ	xyz(7.4158, 5.9566, 23.6759)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F87 #877931

analogous

#316A87 #313F87 #4E3187

triadic

#313F87 #87313F #3F8731

tetradic

#313F87 #87316A #877931 #31874E

square

#313F87 #87316A #877931 #31874E

split-complementary

#313F87 #874E31 #6A8731

monochromatic

#10152D #212A5A #313F87 #4154B4 #6A79C9

Accessibility & contrast

On white

9.58

#313F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#313F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F87

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F87	#FFFFFF	#000000	##FFFFFF
##313F87	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15498A

Deuteranopia (green-blind)

#004186

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313f87;
/* rgb */ color: rgb(49, 63, 135);
/* oklch */ color: oklch(39.8% 0.121 271.6);

Tailwind

colors: {
  custom: {
    50: '#7273aa',
    500: '#313f87',
    950: '#000000',
  },
}

SCSS

$custom: #313f87;
$custom-light: #7273aa;
$custom-dark: #000000;

JSON

{
  "hex": "#313f87",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 135
  },
  "hsl": {
    "h": 230.233,
    "s": 46.739,
    "l": 36.078
  },
  "oklch": {
    "l": 0.3975,
    "c": 0.12088,
    "h": 271.6
  },
  "luminance": 0.05957
}

Semantic roles & 50–950 ramp

primary

#313F87

secondary

#B0A464

accent

#C151D6

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #313F87

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

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