#281B8B#281B8B

#281B8B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.2% C 0.172 H 276.7°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#281B8B
RGB	rgb(40, 27, 139)
HSL	hsl(247, 67%, 33%)
HSV	hsv(247, 81%, 55%)
CMYK	cmyk(71.2%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(20.43, 41.22, -59.17)
CIE-LCH	lch(20.43, 72.11, 304.86°)
OKLab	oklab(33.23% 0.02 -0.171)
OKLCH	oklch(33.23% 0.172 276.7)
XYZ	xyz(5.9257, 3.0985, 24.7069)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B8B #7E8B1B

analogous

#1B468B #281B8B #601B8B

triadic

#281B8B #8B281B #1B8B28

tetradic

#281B8B #8B1B46 #7E8B1B #1B8B60

square

#281B8B #8B1B46 #7E8B1B #1B8B60

split-complementary

#281B8B #8B601B #468B1B

monochromatic

#0B0725 #191158 #281B8B #3725BE #5745DB

Accessibility & contrast

On white

12.96

#281B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#281B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B8B

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B8B	#FFFFFF	#000000	##FFFFFF
##281B8B	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002C89

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #281b8b;
/* rgb */ color: rgb(40, 27, 139);
/* oklch */ color: oklch(33.2% 0.172 276.7);

Tailwind

colors: {
  custom: {
    50: '#725bae',
    500: '#281b8b',
    950: '#000000',
  },
}

SCSS

$custom: #281b8b;
$custom-light: #725bae;
$custom-dark: #000000;

JSON

{
  "hex": "#281b8b",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 246.964,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33229,
    "c": 0.17218,
    "h": 276.7
  },
  "luminance": 0.03099
}

Semantic roles & 50–950 ramp

primary

#281B8B

secondary

#AFBC45

accent

#EA3DD6

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #281B8B

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

Preview Lab → · Contrast checker → · Palette generator →