#281B81#281B81

#281B81 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.160 H 278.2°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#281B81
RGB	rgb(40, 27, 129)
HSL	hsl(248, 65%, 31%)
HSV	hsv(248, 79%, 51%)
CMYK	cmyk(69%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(19.31, 37.97, -54.74)
CIE-LCH	lch(19.31, 66.62, 304.75°)
OKLab	oklab(32.11% 0.0227 -0.1581)
OKLCH	oklch(32.11% 0.16 278.2)
XYZ	xyz(5.2282, 2.8195, 21.0333)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B81 #74811B

analogous

#1B4181 #281B81 #5B1B81

triadic

#281B81 #81281B #1B8128

tetradic

#281B81 #811B41 #74811B #1B815B

square

#281B81 #811B41 #74811B #1B815B

split-complementary

#281B81 #815B1B #41811B

monochromatic

#09061C #18104E #281B81 #3826B4 #533FD7

Accessibility & contrast

On white

13.43

#281B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#281B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B81

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B81	#FFFFFF	#000000	##FFFFFF
##281B81	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#002B7F

Tritanopia (blue-blind)

#00394D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #281b81;
/* rgb */ color: rgb(40, 27, 129);
/* oklch */ color: oklch(32.1% 0.160 278.2);

Tailwind

colors: {
  custom: {
    50: '#705aa7',
    500: '#281b81',
    950: '#000000',
  },
}

SCSS

$custom: #281b81;
$custom-light: #705aa7;
$custom-dark: #000000;

JSON

{
  "hex": "#281b81",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 247.647,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32106,
    "c": 0.15975,
    "h": 278.2
  },
  "luminance": 0.0282
}

Semantic roles & 50–950 ramp

primary

#281B81

secondary

#A6B543

accent

#E83FD3

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #281B81

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

Preview Lab → · Contrast checker → · Palette generator →