#281B8D#281B8D

#281B8D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.5% C 0.175 H 276.4°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#281B8D
RGB	rgb(40, 27, 141)
HSL	hsl(247, 68%, 33%)
HSV	hsv(247, 81%, 55%)
CMYK	cmyk(71.6%, 80.9%, 0%, 44.7%)
CIE-LAB	lab(20.66, 41.86, -60.04)
CIE-LCH	lch(20.66, 73.19, 304.88°)
OKLab	oklab(33.46% 0.0195 -0.1735)
OKLCH	oklch(33.46% 0.175 276.4)
XYZ	xyz(6.0732, 3.1575, 25.4835)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B8D #808D1B

analogous

#1B478D #281B8D #611B8D

triadic

#281B8D #8D281B #1B8D28

tetradic

#281B8D #8D1B47 #808D1B #1B8D61

square

#281B8D #8D1B47 #808D1B #1B8D61

split-complementary

#281B8D #8D611B #478D1B

monochromatic

#0B0726 #19115A #281B8D #3725C0 #5847DC

Accessibility & contrast

On white

12.87

#281B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#281B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B8D

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B8D	#FFFFFF	#000000	##FFFFFF
##281B8D	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003690

Deuteranopia (green-blind)

#002D8B

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #281b8d;
/* rgb */ color: rgb(40, 27, 141);
/* oklch */ color: oklch(33.5% 0.175 276.4);

Tailwind

colors: {
  custom: {
    50: '#735bb0',
    500: '#281b8d',
    950: '#000000',
  },
}

SCSS

$custom: #281b8d;
$custom-light: #735bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#281b8d",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 246.842,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33457,
    "c": 0.17463,
    "h": 276.4
  },
  "luminance": 0.03158
}

Semantic roles & 50–950 ramp

primary

#281B8D

secondary

#B0BD46

accent

#EB3DD7

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281B8D

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

Preview Lab → · Contrast checker → · Palette generator →