#31279B#31279B

#31279B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 37.3% C 0.178 H 277.1°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#31279B
RGB	rgb(49, 39, 155)
HSL	hsl(245, 60%, 38%)
HSV	hsv(245, 75%, 61%)
CMYK	cmyk(68.4%, 74.8%, 0%, 39.2%)
CIE-LAB	lab(25.17, 40.82, -61.23)
CIE-LCH	lch(25.17, 73.59, 303.69°)
OKLab	oklab(37.25% 0.0222 -0.1769)
OKLCH	oklch(37.25% 0.178 277.1)
XYZ	xyz(7.9066, 4.4699, 31.4501)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31279B #919B27

analogous

#27579B #31279B #6B279B

triadic

#31279B #9B3127 #279B31

tetradic

#31279B #9B2757 #919B27 #279B6B

square

#31279B #9B2757 #919B27 #279B6B

split-complementary

#31279B #9B6B27 #579B27

monochromatic

#120E39 #221B6A #31279B #4133CC #6E64D8

Accessibility & contrast

On white

11.09

#31279B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#31279B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31279B

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31279B	#FFFFFF	#000000	##FFFFFF
##31279B	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00409E

Deuteranopia (green-blind)

#003799

Tritanopia (blue-blind)

#00485F

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #31279b;
/* rgb */ color: rgb(49, 39, 155);
/* oklch */ color: oklch(37.3% 0.178 277.1);

Tailwind

colors: {
  custom: {
    50: '#7963ba',
    500: '#31279b',
    950: '#000000',
  },
}

SCSS

$custom: #31279b;
$custom-light: #7963ba;
$custom-dark: #000000;

JSON

{
  "hex": "#31279b",
  "rgb": {
    "r": 49,
    "g": 39,
    "b": 155
  },
  "hsl": {
    "h": 245.172,
    "s": 59.794,
    "l": 38.039
  },
  "oklch": {
    "l": 0.37254,
    "c": 0.17827,
    "h": 277.1
  },
  "luminance": 0.04471
}

Semantic roles & 50–950 ramp

primary

#31279B

secondary

#B6BE60

accent

#E345D5

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0512

muted

#7C7A81

Preview Lab

Preview with #31279B

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

Preview Lab → · Contrast checker → · Palette generator →