#31479B#31479B

#31479B is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.0% C 0.139 H 268.8°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#31479B
RGB	rgb(49, 71, 155)
HSL	hsl(228, 52%, 40%)
HSV	hsv(228, 68%, 61%)
CMYK	cmyk(68.4%, 54.2%, 0%, 39.2%)
CIE-LAB	lab(32.97, 20.41, -48.48)
CIE-LCH	lch(32.97, 52.60, 292.83°)
OKLab	oklab(42.98% -0.0029 -0.1393)
OKLCH	oklch(42.98% 0.139 268.8)
XYZ	xyz(9.4342, 7.5251, 31.9593)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31479B #9B8531

analogous

#317C9B #31479B #50319B

triadic

#31479B #9B3147 #479B31

tetradic

#31479B #9B317C #9B8531 #319B50

square

#31479B #9B317C #9B8531 #319B50

split-complementary

#31479B #9B5031 #7C9B31

monochromatic

#141C3E #22326D #31479B #455FC4 #7387D3

Accessibility & contrast

On white

8.38

#31479B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#31479B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31479B

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31479B	#FFFFFF	#000000	##FFFFFF
##31479B	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D539E

Deuteranopia (green-blind)

#004999

Tritanopia (blue-blind)

#005B6A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #31479b;
/* rgb */ color: rgb(49, 71, 155);
/* oklch */ color: oklch(43.0% 0.139 268.8);

Tailwind

colors: {
  custom: {
    50: '#7679b9',
    500: '#31479b',
    950: '#000000',
  },
}

SCSS

$custom: #31479b;
$custom-light: #7679b9;
$custom-dark: #000000;

JSON

{
  "hex": "#31479b",
  "rgb": {
    "r": 49,
    "g": 71,
    "b": 155
  },
  "hsl": {
    "h": 227.547,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.42979,
    "c": 0.13935,
    "h": 268.8
  },
  "luminance": 0.07526
}

Semantic roles & 50–950 ramp

primary

#31479B

secondary

#BBAB6D

accent

#BE4CDB

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #31479B

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

Preview Lab → · Contrast checker → · Palette generator →