#28378C#28378C

#28378C is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.0% C 0.142 H 270.5°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#28378C
RGB	rgb(40, 55, 140)
HSL	hsl(231, 56%, 35%)
HSV	hsv(231, 71%, 55%)
CMYK	cmyk(71.4%, 60.7%, 0%, 45.1%)
CIE-LAB	lab(26.95, 24.18, -49.09)
CIE-LCH	lch(26.95, 54.73, 296.22°)
OKLab	oklab(37.97% 0.0012 -0.1416)
OKLCH	oklch(37.97% 0.142 270.5)
XYZ	xyz(6.9733, 5.0763, 25.4182)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28378C #8C7D28

analogous

#28698C #28378C #4B288C

triadic

#28378C #8C2837 #378C28

tetradic

#28378C #8C2869 #8C7D28 #288C4B

square

#28378C #8C2869 #8C7D28 #288C4B

split-complementary

#28378C #8C4B28 #698C28

monochromatic

#0D122D #1A245C #28378C #364ABC #5E6FD1

Accessibility & contrast

On white

10.42

#28378C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#28378C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28378C

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28378C	#FFFFFF	#000000	##FFFFFF
##28378C	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448F

Deuteranopia (green-blind)

#003B8A

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #28378c;
/* rgb */ color: rgb(40, 55, 140);
/* oklch */ color: oklch(38.0% 0.142 270.5);

Tailwind

colors: {
  custom: {
    50: '#706dae',
    500: '#28378c',
    950: '#000000',
  },
}

SCSS

$custom: #28378c;
$custom-light: #706dae;
$custom-dark: #000000;

JSON

{
  "hex": "#28378c",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 140
  },
  "hsl": {
    "h": 231,
    "s": 55.556,
    "l": 35.294
  },
  "oklch": {
    "l": 0.37966,
    "c": 0.14157,
    "h": 270.5
  },
  "luminance": 0.05077
}

Semantic roles & 50–950 ramp

primary

#28378C

secondary

#B6A85A

accent

#C849DF

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #28378C

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

Preview Lab → · Contrast checker → · Palette generator →