#281B8E#281B8E

#281B8E is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.6% C 0.176 H 276.3°. Best body text is #FFFFFF at 12.82:1 contrast (WCAG AA passes).

Color values

HEX	#281B8E
RGB	rgb(40, 27, 142)
HSL	hsl(247, 68%, 33%)
HSV	hsv(247, 81%, 56%)
CMYK	cmyk(71.8%, 81%, 0%, 44.3%)
CIE-LAB	lab(20.78, 42.18, -60.47)
CIE-LCH	lch(20.78, 73.73, 304.89°)
OKLab	oklab(33.57% 0.0192 -0.1748)
OKLCH	oklch(33.57% 0.176 276.3)
XYZ	xyz(6.1479, 3.1874, 25.8772)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B8E #818E1B

analogous

#1B478E #281B8E #611B8E

triadic

#281B8E #8E281B #1B8E28

tetradic

#281B8E #8E1B47 #818E1B #1B8E61

square

#281B8E #8E1B47 #818E1B #1B8E61

split-complementary

#281B8E #8E611B #478E1B

monochromatic

#0B0727 #1A115B #281B8E #3625C1 #5847DC

Accessibility & contrast

On white

12.82

#281B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#281B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B8E

12.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B8E	#FFFFFF	#000000	##FFFFFF
##281B8E	1.00	12.82	1.64	12.82
#FFFFFF	12.82	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003791

Deuteranopia (green-blind)

#002D8C

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #281b8e;
/* rgb */ color: rgb(40, 27, 142);
/* oklch */ color: oklch(33.6% 0.176 276.3);

Tailwind

colors: {
  custom: {
    50: '#735bb0',
    500: '#281b8e',
    950: '#000000',
  },
}

SCSS

$custom: #281b8e;
$custom-light: #735bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#281b8e",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 142
  },
  "hsl": {
    "h": 246.783,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33571,
    "c": 0.17585,
    "h": 276.3
  },
  "luminance": 0.03188
}

Semantic roles & 50–950 ramp

primary

#281B8E

secondary

#B0BE47

accent

#EB3DD7

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281B8E

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

Preview Lab → · Contrast checker → · Palette generator →