#281788#281788

#281788 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.172 H 277.6°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#281788
RGB	rgb(40, 23, 136)
HSL	hsl(249, 71%, 31%)
HSV	hsv(249, 83%, 53%)
CMYK	cmyk(70.6%, 83.1%, 0%, 46.7%)
CIE-LAB	lab(19.40, 42.27, -59.01)
CIE-LCH	lch(19.40, 72.59, 305.62°)
OKLab	oklab(32.41% 0.0228 -0.1705)
OKLCH	oklch(32.41% 0.172 277.6)
XYZ	xyz(5.6240, 2.8410, 23.5398)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281788 #778817

analogous

#173E88 #281788 #601788

triadic

#281788 #882817 #178828

tetradic

#281788 #88173E #778817 #178860

square

#281788 #88173E #778817 #178860

split-complementary

#281788 #886017 #3E8817

monochromatic

#09051F #190E54 #281788 #3720BC #543BDE

Accessibility & contrast

On white

13.39

#281788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#281788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281788

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281788	#FFFFFF	#000000	##FFFFFF
##281788	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338B

Deuteranopia (green-blind)

#002A86

Tritanopia (blue-blind)

#003A50

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #281788;
/* rgb */ color: rgb(40, 23, 136);
/* oklch */ color: oklch(32.4% 0.172 277.6);

Tailwind

colors: {
  custom: {
    50: '#7258ac',
    500: '#281788',
    950: '#000000',
  },
}

SCSS

$custom: #281788;
$custom-light: #7258ac;
$custom-dark: #000000;

JSON

{
  "hex": "#281788",
  "rgb": {
    "r": 40,
    "g": 23,
    "b": 136
  },
  "hsl": {
    "h": 249.027,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.32405,
    "c": 0.172,
    "h": 277.6
  },
  "luminance": 0.02841
}

Semantic roles & 50–950 ramp

primary

#281788

secondary

#A9BC3F

accent

#EE3AD3

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #281788

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

Preview Lab → · Contrast checker → · Palette generator →