#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
RGBrgb(40, 27, 139)
HSLhsl(247, 67%, 33%)
HSVhsv(247, 81%, 55%)
CMYKcmyk(71.2%, 80.6%, 0%, 45.5%)
CIE-LABlab(20.43, 41.22, -59.17)
CIE-LCHlch(20.43, 72.11, 304.86°)
OKLaboklab(33.23% 0.02 -0.171)
OKLCHoklch(33.23% 0.172 276.7)
XYZxyz(5.9257, 3.0985, 24.7069)
Luminance0.0310 (WCAG relative)
Temperaturecool
Familyblue

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
##281B8B1.0012.961.6212.96
#FFFFFF12.961.0021.001.00
#0000001.6221.001.0021.00
##FFFFFF12.961.0021.001.00

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 →

#281B8B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva