#28317B#28317B

#28317B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.3% C 0.125 H 273.0°. Best body text is #FFFFFF at 11.57:1 contrast (WCAG AA passes).

Color values

HEX	#28317B
RGB	rgb(40, 49, 123)
HSL	hsl(233, 51%, 32%)
HSV	hsv(233, 67%, 48%)
CMYK	cmyk(67.5%, 60.2%, 0%, 51.8%)
CIE-LAB	lab(23.93, 21.86, -43.37)
CIE-LCH	lch(23.93, 48.57, 296.74°)
OKLab	oklab(35.28% 0.0064 -0.1248)
OKLCH	oklch(35.28% 0.125 273)
XYZ	xyz(5.5473, 4.0773, 19.2297)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28317B #7B7228

analogous

#285B7B #28317B #49287B

triadic

#28317B #7B2831 #317B28

tetradic

#28317B #7B285B #7B7228 #287B49

square

#28317B #7B285B #7B7228 #287B49

split-complementary

#28317B #7B4928 #5B7B28

monochromatic

#0A0C1F #191F4D #28317B #3743A9 #5662C8

Accessibility & contrast

On white

11.57

#28317B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#28317B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28317B

11.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28317B	#FFFFFF	#000000	##FFFFFF
##28317B	1.00	11.57	1.82	11.57
#FFFFFF	11.57	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004351

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #28317b;
/* rgb */ color: rgb(40, 49, 123);
/* oklch */ color: oklch(35.3% 0.125 273.0);

Tailwind

colors: {
  custom: {
    50: '#6c69a2',
    500: '#28317b',
    950: '#000000',
  },
}

SCSS

$custom: #28317b;
$custom-light: #6c69a2;
$custom-dark: #000000;

JSON

{
  "hex": "#28317b",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 123
  },
  "hsl": {
    "h": 233.494,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.35276,
    "c": 0.12499,
    "h": 273
  },
  "luminance": 0.04078
}

Semantic roles & 50–950 ramp

primary

#28317B

secondary

#ADA352

accent

#CB4DDA

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#08060F

muted

#7A7A7F

Preview Lab

Preview with #28317B

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

Preview Lab → · Contrast checker → · Palette generator →