#281B8A#281B8A

#281B8A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.171 H 276.8°. Best body text is #FFFFFF at 13.01:1 contrast (WCAG AA passes).

Color values

HEX	#281B8A
RGB	rgb(40, 27, 138)
HSL	hsl(247, 67%, 32%)
HSV	hsv(247, 80%, 54%)
CMYK	cmyk(71%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(20.32, 40.90, -58.73)
CIE-LCH	lch(20.32, 71.57, 304.85°)
OKLab	oklab(33.12% 0.0203 -0.1697)
OKLCH	oklch(33.12% 0.171 276.8)
XYZ	xyz(5.8530, 3.0694, 24.3238)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B8A #7D8A1B

analogous

#1B468A #281B8A #601B8A

triadic

#281B8A #8A281B #1B8A28

tetradic

#281B8A #8A1B46 #7D8A1B #1B8A60

square

#281B8A #8A1B46 #7D8A1B #1B8A60

split-complementary

#281B8A #8A601B #468A1B

monochromatic

#0A0724 #191157 #281B8A #3725BD #5645DB

Accessibility & contrast

On white

13.01

#281B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#281B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B8A

13.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B8A	#FFFFFF	#000000	##FFFFFF
##281B8A	1.00	13.01	1.61	13.01
#FFFFFF	13.01	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368D

Deuteranopia (green-blind)

#002C88

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #281b8a;
/* rgb */ color: rgb(40, 27, 138);
/* oklch */ color: oklch(33.1% 0.171 276.8);

Tailwind

colors: {
  custom: {
    50: '#725aad',
    500: '#281b8a',
    950: '#000000',
  },
}

SCSS

$custom: #281b8a;
$custom-light: #725aad;
$custom-dark: #000000;

JSON

{
  "hex": "#281b8a",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 247.027,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.33115,
    "c": 0.17095,
    "h": 276.8
  },
  "luminance": 0.0307
}

Semantic roles & 50–950 ramp

primary

#281B8A

secondary

#AEBC45

accent

#EA3ED6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #281B8A

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

Preview Lab → · Contrast checker → · Palette generator →