#31399C#31399C

#31399C is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.159 H 273.3°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#31399C
RGB	rgb(49, 57, 156)
HSL	hsl(236, 52%, 40%)
HSV	hsv(236, 69%, 61%)
CMYK	cmyk(68.6%, 63.5%, 0%, 38.8%)
CIE-LAB	lab(29.36, 30.07, -54.96)
CIE-LCH	lch(29.36, 62.65, 298.68°)
OKLab	oklab(40.31% 0.0092 -0.1585)
OKLCH	oklch(40.31% 0.159 273.3)
XYZ	xyz(8.7285, 5.9787, 32.1401)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31399C #9C9431

analogous

#316E9C #31399C #5E319C

triadic

#31399C #9C3139 #399C31

tetradic

#31399C #9C316E #9C9431 #319C5E

square

#31399C #9C316E #9C9431 #319C5E

split-complementary

#31399C #9C5E31 #6E9C31

monochromatic

#14173F #22286D #31399C #454FC5 #747BD3

Accessibility & contrast

On white

9.56

#31399C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#31399C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31399C

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31399C	#FFFFFF	#000000	##FFFFFF
##31399C	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9F

Deuteranopia (green-blind)

#00409A

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #31399c;
/* rgb */ color: rgb(49, 57, 156);
/* oklch */ color: oklch(40.3% 0.159 273.3);

Tailwind

colors: {
  custom: {
    50: '#776fba',
    500: '#31399c',
    950: '#000000',
  },
}

SCSS

$custom: #31399c;
$custom-light: #776fba;
$custom-dark: #000000;

JSON

{
  "hex": "#31399c",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 156
  },
  "hsl": {
    "h": 235.514,
    "s": 52.195,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4031,
    "c": 0.15881,
    "h": 273.3
  },
  "luminance": 0.0598
}

Semantic roles & 50–950 ramp

primary

#31399C

secondary

#BBB66D

accent

#D14CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #31399C

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

Preview Lab → · Contrast checker → · Palette generator →