#313F8D#313F8D

#313F8D is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.130 H 271.7°. Best body text is #FFFFFF at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#313F8D
RGB	rgb(49, 63, 141)
HSL	hsl(231, 48%, 37%)
HSV	hsv(231, 65%, 55%)
CMYK	cmyk(65.2%, 55.3%, 0%, 44.7%)
CIE-LAB	lab(29.74, 20.59, -45.16)
CIE-LCH	lch(29.74, 49.64, 294.51°)
OKLab	oklab(40.22% 0.0038 -0.1297)
OKLCH	oklch(40.22% 0.13 271.7)
XYZ	xyz(7.8502, 6.1304, 25.9637)
Luminance	0.0613 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F8D #8D7F31

analogous

#316D8D #313F8D #51318D

triadic

#313F8D #8D313F #3F8D31

tetradic

#313F8D #8D316D #8D7F31 #318D51

square

#313F8D #8D316D #8D7F31 #318D51

split-complementary

#313F8D #8D5131 #6D8D31

monochromatic

#111632 #212B60 #313F8D #4153BA #6C7BCC

Accessibility & contrast

On white

9.43

#313F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#313F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F8D

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F8D	#FFFFFF	#000000	##FFFFFF
##313F8D	1.00	9.43	2.23	9.43
#FFFFFF	9.43	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084A90

Deuteranopia (green-blind)

#00428B

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313f8d;
/* rgb */ color: rgb(49, 63, 141);
/* oklch */ color: oklch(40.2% 0.130 271.7);

Tailwind

colors: {
  custom: {
    50: '#7373af',
    500: '#313f8d',
    950: '#000000',
  },
}

SCSS

$custom: #313f8d;
$custom-light: #7373af;
$custom-dark: #000000;

JSON

{
  "hex": "#313f8d",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 141
  },
  "hsl": {
    "h": 230.87,
    "s": 48.421,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40217,
    "c": 0.12972,
    "h": 271.7
  },
  "luminance": 0.06131
}

Semantic roles & 50–950 ramp

primary

#313F8D

secondary

#B4A866

accent

#C350D8

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #313F8D

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

Preview Lab → · Contrast checker → · Palette generator →