#281F8A#281F8A

#281F8A is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.6% C 0.167 H 276.3°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#281F8A
RGB	rgb(40, 31, 138)
HSL	hsl(245, 63%, 33%)
HSV	hsv(245, 78%, 54%)
CMYK	cmyk(71%, 77.5%, 0%, 45.9%)
CIE-LAB	lab(21.08, 38.73, -57.48)
CIE-LCH	lch(21.08, 69.31, 303.97°)
OKLab	oklab(33.65% 0.0182 -0.1661)
OKLCH	oklch(33.65% 0.167 276.3)
XYZ	xyz(5.9510, 3.2655, 24.3565)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8A #818A1F

analogous

#1F4B8A #281F8A #5D1F8A

triadic

#281F8A #8A281F #1F8A28

tetradic

#281F8A #8A1F4B #818A1F #1F8A5D

square

#281F8A #8A1F4B #818A1F #1F8A5D

split-complementary

#281F8A #8A5D1F #4B8A1F

monochromatic

#0B0926 #1A1458 #281F8A #362ABC #584CD7

Accessibility & contrast

On white

12.70

#281F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#281F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8A

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8A	#FFFFFF	#000000	##FFFFFF
##281F8A	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378D

Deuteranopia (green-blind)

#002E88

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #281f8a;
/* rgb */ color: rgb(40, 31, 138);
/* oklch */ color: oklch(33.6% 0.167 276.3);

Tailwind

colors: {
  custom: {
    50: '#725dad',
    500: '#281f8a',
    950: '#000000',
  },
}

SCSS

$custom: #281f8a;
$custom-light: #725dad;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8a",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 138
  },
  "hsl": {
    "h": 245.047,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33647,
    "c": 0.16715,
    "h": 276.3
  },
  "luminance": 0.03266
}

Semantic roles & 50–950 ramp

primary

#281F8A

secondary

#B0BA4B

accent

#E641D8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #281F8A

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

Preview Lab → · Contrast checker → · Palette generator →