#2B31A9#2B31A9

#2B31A9 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.8% C 0.187 H 272.0°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#2B31A9
RGB	rgb(43, 49, 169)
HSL	hsl(237, 59%, 42%)
HSV	hsv(237, 75%, 66%)
CMYK	cmyk(74.6%, 71%, 0%, 33.7%)
CIE-LAB	lab(28.31, 39.02, -64.56)
CIE-LCH	lch(28.31, 75.44, 301.15°)
OKLab	oklab(39.82% 0.0065 -0.1868)
OKLCH	oklch(39.82% 0.187 272)
XYZ	xyz(9.2536, 5.5738, 38.1166)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B31A9 #A9A32B

analogous

#2B70A9 #2B31A9 #642BA9

triadic

#2B31A9 #A92B31 #31A92B

tetradic

#2B31A9 #A92B70 #A9A32B #2BA964

square

#2B31A9 #A92B70 #A9A32B #2BA964

split-complementary

#2B31A9 #A9642B #70A92B

monochromatic

#121547 #1F2378 #2B31A9 #4249CF #7378DB

Accessibility & contrast

On white

9.93

#2B31A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#2B31A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B31A9

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B31A9	#FFFFFF	#000000	##FFFFFF
##2B31A9	1.00	9.93	2.12	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049AD

Deuteranopia (green-blind)

#003DA7

Tritanopia (blue-blind)

#005269

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #2b31a9;
/* rgb */ color: rgb(43, 49, 169);
/* oklch */ color: oklch(39.8% 0.187 272.0);

Tailwind

colors: {
  custom: {
    50: '#786ac4',
    500: '#2b31a9',
    950: '#000000',
  },
}

SCSS

$custom: #2b31a9;
$custom-light: #786ac4;
$custom-dark: #000000;

JSON

{
  "hex": "#2b31a9",
  "rgb": {
    "r": 43,
    "g": 49,
    "b": 169
  },
  "hsl": {
    "h": 237.143,
    "s": 59.434,
    "l": 41.569
  },
  "oklch": {
    "l": 0.3982,
    "c": 0.1869,
    "h": 272
  },
  "luminance": 0.05575
}

Semantic roles & 50–950 ramp

primary

#2B31A9

secondary

#C3BF6D

accent

#DB45E3

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #2B31A9

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

Preview Lab → · Contrast checker → · Palette generator →