#281B8C#281B8C

#281B8C is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.3% C 0.173 H 276.5°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#281B8C
RGB	rgb(40, 27, 140)
HSL	hsl(247, 68%, 33%)
HSV	hsv(247, 81%, 55%)
CMYK	cmyk(71.4%, 80.7%, 0%, 45.1%)
CIE-LAB	lab(20.55, 41.54, -59.60)
CIE-LCH	lch(20.55, 72.65, 304.87°)
OKLab	oklab(33.34% 0.0198 -0.1723)
OKLCH	oklch(33.34% 0.173 276.5)
XYZ	xyz(5.9991, 3.1279, 25.0934)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B8C #7F8C1B

analogous

#1B468C #281B8C #611B8C

triadic

#281B8C #8C281B #1B8C28

tetradic

#281B8C #8C1B46 #7F8C1B #1B8C61

square

#281B8C #8C1B46 #7F8C1B #1B8C61

split-complementary

#281B8C #8C611B #468C1B

monochromatic

#0B0725 #191159 #281B8C #3725BF #5746DB

Accessibility & contrast

On white

12.92

#281B8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#281B8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B8C

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B8C	#FFFFFF	#000000	##FFFFFF
##281B8C	1.00	12.92	1.63	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368F

Deuteranopia (green-blind)

#002D8A

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #281b8c;
/* rgb */ color: rgb(40, 27, 140);
/* oklch */ color: oklch(33.3% 0.173 276.5);

Tailwind

colors: {
  custom: {
    50: '#725baf',
    500: '#281b8c',
    950: '#000000',
  },
}

SCSS

$custom: #281b8c;
$custom-light: #725baf;
$custom-dark: #000000;

JSON

{
  "hex": "#281b8c",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 140
  },
  "hsl": {
    "h": 246.903,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33343,
    "c": 0.17341,
    "h": 276.5
  },
  "luminance": 0.03128
}

Semantic roles & 50–950 ramp

primary

#281B8C

secondary

#AFBD46

accent

#EB3DD7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #281B8C

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

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