#28178C#28178C

#28178C is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.177 H 277.0°. Best body text is #FFFFFF at 13.20:1 contrast (WCAG AA passes).

Color values

HEX	#28178C
RGB	rgb(40, 23, 140)
HSL	hsl(249, 72%, 32%)
HSV	hsv(249, 84%, 55%)
CMYK	cmyk(71.4%, 83.6%, 0%, 45.1%)
CIE-LAB	lab(19.87, 43.51, -60.73)
CIE-LCH	lch(19.87, 74.71, 305.62°)
OKLab	oklab(32.87% 0.0215 -0.1755)
OKLCH	oklch(32.87% 0.177 277)
XYZ	xyz(5.9136, 2.9568, 25.0649)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28178C #7B8C17

analogous

#17418C #28178C #63178C

triadic

#28178C #8C2817 #178C28

tetradic

#28178C #8C1741 #7B8C17 #178C63

square

#28178C #8C1741 #7B8C17 #178C63

split-complementary

#28178C #8C6317 #418C17

monochromatic

#0A0623 #190E57 #28178C #3720C1 #563EDF

Accessibility & contrast

On white

13.20

#28178C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#28178C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28178C

13.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28178C	#FFFFFF	#000000	##FFFFFF
##28178C	1.00	13.20	1.59	13.20
#FFFFFF	13.20	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358F

Deuteranopia (green-blind)

#002B8A

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #28178c;
/* rgb */ color: rgb(40, 23, 140);
/* oklch */ color: oklch(32.9% 0.177 277.0);

Tailwind

colors: {
  custom: {
    50: '#7358af',
    500: '#28178c',
    950: '#000000',
  },
}

SCSS

$custom: #28178c;
$custom-light: #7358af;
$custom-dark: #000000;

JSON

{
  "hex": "#28178c",
  "rgb": {
    "r": 40,
    "g": 23,
    "b": 140
  },
  "hsl": {
    "h": 248.718,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32872,
    "c": 0.1768,
    "h": 277
  },
  "luminance": 0.02957
}

Semantic roles & 50–950 ramp

primary

#28178C

secondary

#ADBF3F

accent

#EF39D4

background

#F7F5FA

surface

#EEE9F5

border

#C9C5CF

text

#090411

muted

#7B7980

Preview Lab

Preview with #28178C

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

Preview Lab → · Contrast checker → · Palette generator →