#281B5B#281B5B

#281B5B is a dark, moderate violet. Relative luminance 0.020; OKLCH L 28.2% C 0.109 H 286.5°. Best body text is #FFFFFF at 15.02:1 contrast (WCAG AA passes).

Color values

HEX	#281B5B
RGB	rgb(40, 27, 91)
HSL	hsl(252, 54%, 23%)
HSV	hsv(252, 70%, 36%)
CMYK	cmyk(56%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(15.44, 25.19, -36.38)
CIE-LCH	lch(15.44, 44.25, 304.70°)
OKLab	oklab(28.18% 0.0309 -0.1044)
OKLCH	oklch(28.18% 0.109 286.5)
XYZ	xyz(3.1548, 1.9902, 10.1134)
Luminance	0.0199 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B5B #4E5B1B

analogous

#1B2E5B #281B5B #481B5B

triadic

#281B5B #5B281B #1B5B28

tetradic

#281B5B #5B1B2E #4E5B1B #1B5B48

square

#281B5B #5B1B2E #4E5B1B #1B5B48

split-complementary

#281B5B #5B481B #2E5B1B

monochromatic

#0A0718 #130D2C #281B5B #3D298A #5137B9

Accessibility & contrast

On white

15.02

#281B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#281B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B5B

15.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B5B	#FFFFFF	#000000	##FFFFFF
##281B5B	1.00	15.02	1.40	15.02
#FFFFFF	15.02	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285D

Deuteranopia (green-blind)

#00255A

Tritanopia (blue-blind)

#142B38

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #281b5b;
/* rgb */ color: rgb(40, 27, 91);
/* oklch */ color: oklch(28.2% 0.109 286.5);

Tailwind

colors: {
  custom: {
    50: '#68588a',
    500: '#281b5b',
    950: '#000000',
  },
}

SCSS

$custom: #281b5b;
$custom-light: #68588a;
$custom-dark: #000000;

JSON

{
  "hex": "#281b5b",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 252.188,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.28177,
    "c": 0.10886,
    "h": 286.5
  },
  "luminance": 0.0199
}

Semantic roles & 50–950 ramp

primary

#281B5B

secondary

#819141

accent

#DE4AC0

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #281B5B

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

Preview Lab → · Contrast checker → · Palette generator →