#281F99#281F99

#281F99 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.3% C 0.186 H 274.5°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#281F99
RGB	rgb(40, 31, 153)
HSL	hsl(244, 66%, 36%)
HSV	hsv(244, 80%, 60%)
CMYK	cmyk(73.9%, 79.7%, 0%, 40%)
CIE-LAB	lab(22.76, 43.64, -64.00)
CIE-LCH	lch(22.76, 77.46, 304.29°)
OKLab	oklab(35.32% 0.0146 -0.1851)
OKLCH	oklch(35.32% 0.186 274.5)
XYZ	xyz(7.1129, 3.7303, 30.4760)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F99 #90991F

analogous

#1F5399 #281F99 #651F99

triadic

#281F99 #99281F #1F9928

tetradic

#281F99 #991F53 #90991F #1F9965

square

#281F99 #991F53 #90991F #1F9965

split-complementary

#281F99 #99651F #53991F

monochromatic

#0D0A33 #1B1566 #281F99 #3529CC #6056DD

Accessibility & contrast

On white

12.03

#281F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#281F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F99

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F99	#FFFFFF	#000000	##FFFFFF
##281F99	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9C

Deuteranopia (green-blind)

#003197

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #281f99;
/* rgb */ color: rgb(40, 31, 153);
/* oklch */ color: oklch(35.3% 0.186 274.5);

Tailwind

colors: {
  custom: {
    50: '#755eb8',
    500: '#281f99',
    950: '#000000',
  },
}

SCSS

$custom: #281f99;
$custom-light: #755eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#281f99",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 153
  },
  "hsl": {
    "h": 244.426,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.35323,
    "c": 0.18568,
    "h": 274.5
  },
  "luminance": 0.03731
}

Semantic roles & 50–950 ramp

primary

#281F99

secondary

#B8C054

accent

#E93FDD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281F99

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

Preview Lab → · Contrast checker → · Palette generator →