#313A87#313A87

#313A87 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.128 H 273.8°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#313A87
RGB	rgb(49, 58, 135)
HSL	hsl(234, 47%, 36%)
HSV	hsv(234, 64%, 53%)
CMYK	cmyk(63.7%, 57%, 0%, 47.1%)
CIE-LAB	lab(27.92, 21.77, -44.39)
CIE-LCH	lch(27.92, 49.44, 296.12°)
OKLab	oklab(38.71% 0.0085 -0.1275)
OKLCH	oklch(38.71% 0.128 273.8)
XYZ	xyz(7.1514, 5.4278, 23.5878)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A87 #877E31

analogous

#316587 #313A87 #533187

triadic

#313A87 #87313A #3A8731

tetradic

#313A87 #873165 #877E31 #318753

square

#313A87 #873165 #877E31 #318753

split-complementary

#313A87 #875331 #658731

monochromatic

#10132D #21275A #313A87 #414DB4 #6A74C9

Accessibility & contrast

On white

10.07

#313A87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#313A87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A87

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A87	#FFFFFF	#000000	##FFFFFF
##313A87	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468A

Deuteranopia (green-blind)

#003E85

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313a87;
/* rgb */ color: rgb(49, 58, 135);
/* oklch */ color: oklch(38.7% 0.128 273.8);

Tailwind

colors: {
  custom: {
    50: '#7370ab',
    500: '#313a87',
    950: '#000000',
  },
}

SCSS

$custom: #313a87;
$custom-light: #7370ab;
$custom-dark: #000000;

JSON

{
  "hex": "#313a87",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 135
  },
  "hsl": {
    "h": 233.721,
    "s": 46.739,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38711,
    "c": 0.12775,
    "h": 273.8
  },
  "luminance": 0.05428
}

Semantic roles & 50–950 ramp

primary

#313A87

secondary

#B0A864

accent

#C851D6

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313A87

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

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