#31439B#31439B

#31439B is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.2% C 0.145 H 270.3°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#31439B
RGB	rgb(49, 67, 155)
HSL	hsl(230, 52%, 40%)
HSV	hsv(230, 68%, 61%)
CMYK	cmyk(68.4%, 56.8%, 0%, 39.2%)
CIE-LAB	lab(31.88, 23.09, -50.25)
CIE-LCH	lch(31.88, 55.30, 294.68°)
OKLab	oklab(42.16% 0.0007 -0.1446)
OKLCH	oklch(42.16% 0.145 270.3)
XYZ	xyz(9.1882, 7.0330, 31.8773)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31439B #9B8931

analogous

#31789B #31439B #54319B

triadic

#31439B #9B3143 #439B31

tetradic

#31439B #9B3178 #9B8931 #319B54

square

#31439B #9B3178 #9B8931 #319B54

split-complementary

#31439B #9B5431 #789B31

monochromatic

#141B3E #222F6D #31439B #455BC4 #7384D3

Accessibility & contrast

On white

8.73

#31439B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#31439B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31439B

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31439B	#FFFFFF	#000000	##FFFFFF
##31439B	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509E

Deuteranopia (green-blind)

#004699

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #31439b;
/* rgb */ color: rgb(49, 67, 155);
/* oklch */ color: oklch(42.2% 0.145 270.3);

Tailwind

colors: {
  custom: {
    50: '#7676b9',
    500: '#31439b',
    950: '#000000',
  },
}

SCSS

$custom: #31439b;
$custom-light: #7676b9;
$custom-dark: #000000;

JSON

{
  "hex": "#31439b",
  "rgb": {
    "r": 49,
    "g": 67,
    "b": 155
  },
  "hsl": {
    "h": 229.811,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.42158,
    "c": 0.14458,
    "h": 270.3
  },
  "luminance": 0.07034
}

Semantic roles & 50–950 ramp

primary

#31439B

secondary

#BBAE6D

accent

#C34CDB

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #31439B

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

Preview Lab → · Contrast checker → · Palette generator →