#31399B#31399B

#31399B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.2% C 0.157 H 273.4°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#31399B
RGB	rgb(49, 57, 155)
HSL	hsl(235, 52%, 40%)
HSV	hsv(235, 68%, 61%)
CMYK	cmyk(68.4%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(29.27, 29.71, -54.49)
CIE-LCH	lch(29.27, 62.06, 298.60°)
OKLab	oklab(40.22% 0.0093 -0.1572)
OKLCH	oklch(40.22% 0.157 273.4)
XYZ	xyz(8.6442, 5.9450, 31.6959)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31399B #9B9331

analogous

#316E9B #31399B #5E319B

triadic

#31399B #9B3139 #399B31

tetradic

#31399B #9B316E #9B9331 #319B5E

square

#31399B #9B316E #9B9331 #319B5E

split-complementary

#31399B #9B5E31 #6E9B31

monochromatic

#14173E #22286D #31399B #454FC4 #737BD3

Accessibility & contrast

On white

9.59

#31399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#31399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31399B

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31399B	#FFFFFF	#000000	##FFFFFF
##31399B	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #31399b;
/* rgb */ color: rgb(49, 57, 155);
/* oklch */ color: oklch(40.2% 0.157 273.4);

Tailwind

colors: {
  custom: {
    50: '#776fb9',
    500: '#31399b',
    950: '#000000',
  },
}

SCSS

$custom: #31399b;
$custom-light: #776fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#31399b",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 235.472,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.40221,
    "c": 0.15743,
    "h": 273.4
  },
  "luminance": 0.05946
}

Semantic roles & 50–950 ramp

primary

#31399B

secondary

#BBB56D

accent

#D14CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #31399B

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

Preview Lab → · Contrast checker → · Palette generator →