#313D88#313D88

#313D88 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.125 H 272.5°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#313D88
RGB	rgb(49, 61, 136)
HSL	hsl(232, 47%, 36%)
HSV	hsv(232, 64%, 53%)
CMYK	cmyk(64%, 55.1%, 0%, 46.7%)
CIE-LAB	lab(28.82, 20.11, -43.56)
CIE-LCH	lch(28.82, 47.98, 294.78°)
OKLab	oklab(39.41% 0.0055 -0.125)
OKLCH	oklch(39.41% 0.125 272.5)
XYZ	xyz(7.3778, 5.7674, 24.0122)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D88 #887C31

analogous

#316988 #313D88 #513188

triadic

#313D88 #88313D #3D8831

tetradic

#313D88 #883169 #887C31 #318851

square

#313D88 #883169 #887C31 #318851

split-complementary

#313D88 #885131 #698831

monochromatic

#11152E #21295B #313D88 #4151B5 #6A77C9

Accessibility & contrast

On white

9.75

#313D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#313D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D88

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D88	#FFFFFF	#000000	##FFFFFF
##313D88	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B488B

Deuteranopia (green-blind)

#004086

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313d88;
/* rgb */ color: rgb(49, 61, 136);
/* oklch */ color: oklch(39.4% 0.125 272.5);

Tailwind

colors: {
  custom: {
    50: '#7372ab',
    500: '#313d88',
    950: '#000000',
  },
}

SCSS

$custom: #313d88;
$custom-light: #7372ab;
$custom-dark: #000000;

JSON

{
  "hex": "#313d88",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 136
  },
  "hsl": {
    "h": 231.724,
    "s": 47.027,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39408,
    "c": 0.12511,
    "h": 272.5
  },
  "luminance": 0.05768
}

Semantic roles & 50–950 ramp

primary

#313D88

secondary

#B1A664

accent

#C451D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313D88

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

Preview Lab → · Contrast checker → · Palette generator →