#28378D#28378D

#28378D is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.143 H 270.5°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#28378D
RGB	rgb(40, 55, 141)
HSL	hsl(231, 56%, 35%)
HSV	hsv(231, 72%, 55%)
CMYK	cmyk(71.6%, 61%, 0%, 44.7%)
CIE-LAB	lab(27.03, 24.56, -49.58)
CIE-LCH	lch(27.03, 55.33, 296.35°)
OKLab	oklab(38.05% 0.0012 -0.143)
OKLCH	oklch(38.05% 0.143 270.5)
XYZ	xyz(7.0473, 5.1059, 25.8083)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28378D #8D7E28

analogous

#28698D #28378D #4B288D

triadic

#28378D #8D2837 #378D28

tetradic

#28378D #8D2869 #8D7E28 #288D4B

square

#28378D #8D2869 #8D7E28 #288D4B

split-complementary

#28378D #8D4B28 #698D28

monochromatic

#0D122E #1A245D #28378D #364ABD #5E6FD1

Accessibility & contrast

On white

10.39

#28378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#28378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28378D

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28378D	#FFFFFF	#000000	##FFFFFF
##28378D	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#003B8B

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #28378d;
/* rgb */ color: rgb(40, 55, 141);
/* oklch */ color: oklch(38.1% 0.143 270.5);

Tailwind

colors: {
  custom: {
    50: '#706daf',
    500: '#28378d',
    950: '#000000',
  },
}

SCSS

$custom: #28378d;
$custom-light: #706daf;
$custom-dark: #000000;

JSON

{
  "hex": "#28378d",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 231.089,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.38054,
    "c": 0.14298,
    "h": 270.5
  },
  "luminance": 0.05107
}

Semantic roles & 50–950 ramp

primary

#28378D

secondary

#B7A95A

accent

#C949DF

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #28378D

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

Preview Lab → · Contrast checker → · Palette generator →