#281B83#281B83

#281B83 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.3% C 0.162 H 277.9°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#281B83
RGB	rgb(40, 27, 131)
HSL	hsl(248, 66%, 31%)
HSV	hsv(248, 79%, 51%)
CMYK	cmyk(69.5%, 79.4%, 0%, 48.6%)
CIE-LAB	lab(19.53, 38.63, -55.64)
CIE-LCH	lch(19.53, 67.73, 304.77°)
OKLab	oklab(32.33% 0.0222 -0.1607)
OKLCH	oklch(32.33% 0.162 277.9)
XYZ	xyz(5.3624, 2.8732, 21.7403)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B83 #76831B

analogous

#1B4283 #281B83 #5C1B83

triadic

#281B83 #83281B #1B8328

tetradic

#281B83 #831B42 #76831B #1B835C

square

#281B83 #831B42 #76831B #1B835C

split-complementary

#281B83 #835C1B #42831B

monochromatic

#09061E #191150 #281B83 #3725B6 #5441D8

Accessibility & contrast

On white

13.34

#281B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#281B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B83

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B83	#FFFFFF	#000000	##FFFFFF
##281B83	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003386

Deuteranopia (green-blind)

#002B81

Tritanopia (blue-blind)

#003A4E

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #281b83;
/* rgb */ color: rgb(40, 27, 131);
/* oklch */ color: oklch(32.3% 0.162 277.9);

Tailwind

colors: {
  custom: {
    50: '#705aa8',
    500: '#281b83',
    950: '#000000',
  },
}

SCSS

$custom: #281b83;
$custom-light: #705aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#281b83",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 131
  },
  "hsl": {
    "h": 247.5,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.32328,
    "c": 0.16226,
    "h": 277.9
  },
  "luminance": 0.02874
}

Semantic roles & 50–950 ramp

primary

#281B83

secondary

#A8B643

accent

#E93FD4

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #281B83

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

Preview Lab → · Contrast checker → · Palette generator →