#313A88#313A88

#313A88 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.129 H 273.8°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#313A88
RGB	rgb(49, 58, 136)
HSL	hsl(234, 47%, 36%)
HSV	hsv(234, 64%, 53%)
CMYK	cmyk(64%, 57.4%, 0%, 46.7%)
CIE-LAB	lab(28.00, 22.14, -44.89)
CIE-LCH	lch(28.00, 50.05, 296.25°)
OKLab	oklab(38.79% 0.0085 -0.1289)
OKLCH	oklch(38.79% 0.129 273.8)
XYZ	xyz(7.2221, 5.4561, 23.9603)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A88 #887F31

analogous

#316688 #313A88 #543188

triadic

#313A88 #88313A #3A8831

tetradic

#313A88 #883166 #887F31 #318854

square

#313A88 #883166 #887F31 #318854

split-complementary

#313A88 #885431 #668831

monochromatic

#11142E #21275B #313A88 #414DB5 #6A74C9

Accessibility & contrast

On white

10.04

#313A88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#313A88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A88

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A88	#FFFFFF	#000000	##FFFFFF
##313A88	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468B

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313a88;
/* rgb */ color: rgb(49, 58, 136);
/* oklch */ color: oklch(38.8% 0.129 273.8);

Tailwind

colors: {
  custom: {
    50: '#7370ab',
    500: '#313a88',
    950: '#000000',
  },
}

SCSS

$custom: #313a88;
$custom-light: #7370ab;
$custom-dark: #000000;

JSON

{
  "hex": "#313a88",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 136
  },
  "hsl": {
    "h": 233.793,
    "s": 47.027,
    "l": 36.275
  },
  "oklch": {
    "l": 0.38792,
    "c": 0.12921,
    "h": 273.8
  },
  "luminance": 0.05457
}

Semantic roles & 50–950 ramp

primary

#313A88

secondary

#B1A964

accent

#C951D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313A88

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

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