#281D8B#281D8B

#281D8B is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.5% C 0.170 H 276.4°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#281D8B
RGB	rgb(40, 29, 139)
HSL	hsl(246, 65%, 33%)
HSV	hsv(246, 79%, 55%)
CMYK	cmyk(71.2%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(20.80, 40.16, -58.56)
CIE-LCH	lch(20.80, 71.01, 304.44°)
OKLab	oklab(33.49% 0.019 -0.1693)
OKLCH	oklch(33.49% 0.17 276.4)
XYZ	xyz(5.9731, 3.1934, 24.7227)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281D8B #808B1D

analogous

#1D498B #281D8B #5F1D8B

triadic

#281D8B #8B281D #1D8B28

tetradic

#281D8B #8B1D49 #808B1D #1D8B5F

square

#281D8B #8B1D49 #808B1D #1D8B5F

split-complementary

#281D8B #8B5F1D #498B1D

monochromatic

#0B0826 #191258 #281D8B #3728BE #5849D9

Accessibility & contrast

On white

12.81

#281D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#281D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281D8B

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281D8B	#FFFFFF	#000000	##FFFFFF
##281D8B	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378E

Deuteranopia (green-blind)

#002D89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #281d8b;
/* rgb */ color: rgb(40, 29, 139);
/* oklch */ color: oklch(33.5% 0.170 276.4);

Tailwind

colors: {
  custom: {
    50: '#725cae',
    500: '#281d8b',
    950: '#000000',
  },
}

SCSS

$custom: #281d8b;
$custom-light: #725cae;
$custom-dark: #000000;

JSON

{
  "hex": "#281d8b",
  "rgb": {
    "r": 40,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 246,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33486,
    "c": 0.17034,
    "h": 276.4
  },
  "luminance": 0.03194
}

Semantic roles & 50–950 ramp

primary

#281D8B

secondary

#B0BB49

accent

#E83FD8

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #281D8B

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

Preview Lab → · Contrast checker → · Palette generator →