#31399D#31399D

#31399D is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.160 H 273.3°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#31399D
RGB	rgb(49, 57, 157)
HSL	hsl(236, 52%, 40%)
HSV	hsv(236, 69%, 62%)
CMYK	cmyk(68.8%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(29.44, 30.43, -55.43)
CIE-LCH	lch(29.44, 63.23, 298.77°)
OKLab	oklab(40.4% 0.0092 -0.1599)
OKLCH	oklch(40.4% 0.16 273.3)
XYZ	xyz(8.8135, 6.0127, 32.5879)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31399D #9D9531

analogous

#316F9D #31399D #5F319D

triadic

#31399D #9D3139 #399D31

tetradic

#31399D #9D316F #9D9531 #319D5F

square

#31399D #9D316F #9D9531 #319D5F

split-complementary

#31399D #9D5F31 #6F9D31

monochromatic

#141740 #22286E #31399D #464FC5 #757CD4

Accessibility & contrast

On white

9.53

#31399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#31399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31399D

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31399D	#FFFFFF	#000000	##FFFFFF
##31399D	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA0

Deuteranopia (green-blind)

#00419B

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #31399d;
/* rgb */ color: rgb(49, 57, 157);
/* oklch */ color: oklch(40.4% 0.160 273.3);

Tailwind

colors: {
  custom: {
    50: '#776fbb',
    500: '#31399d',
    950: '#000000',
  },
}

SCSS

$custom: #31399d;
$custom-light: #776fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#31399d",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 235.556,
    "s": 52.427,
    "l": 40.392
  },
  "oklch": {
    "l": 0.404,
    "c": 0.16017,
    "h": 273.3
  },
  "luminance": 0.06014
}

Semantic roles & 50–950 ramp

primary

#31399D

secondary

#BCB66E

accent

#D14CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #31399D

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

Preview Lab → · Contrast checker → · Palette generator →