#28378E#28378E

#28378E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.144 H 270.5°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#28378E
RGB	rgb(40, 55, 142)
HSL	hsl(231, 56%, 36%)
HSV	hsv(231, 72%, 56%)
CMYK	cmyk(71.8%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(27.12, 24.94, -50.06)
CIE-LCH	lch(27.12, 55.93, 296.48°)
OKLab	oklab(38.14% 0.0012 -0.1444)
OKLCH	oklch(38.14% 0.144 270.5)
XYZ	xyz(7.1221, 5.1358, 26.2019)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28378E #8E7F28

analogous

#286A8E #28378E #4C288E

triadic

#28378E #8E2837 #378E28

tetradic

#28378E #8E286A #8E7F28 #288E4C

square

#28378E #8E286A #8E7F28 #288E4C

split-complementary

#28378E #8E4C28 #6A8E28

monochromatic

#0D122F #1B255E #28378E #3549BE #5F70D2

Accessibility & contrast

On white

10.36

#28378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#28378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28378E

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28378E	#FFFFFF	#000000	##FFFFFF
##28378E	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004591

Deuteranopia (green-blind)

#003C8C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #28378e;
/* rgb */ color: rgb(40, 55, 142);
/* oklch */ color: oklch(38.1% 0.144 270.5);

Tailwind

colors: {
  custom: {
    50: '#706db0',
    500: '#28378e',
    950: '#000000',
  },
}

SCSS

$custom: #28378e;
$custom-light: #706db0;
$custom-dark: #000000;

JSON

{
  "hex": "#28378e",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 231.176,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38142,
    "c": 0.1444,
    "h": 270.5
  },
  "luminance": 0.05136
}

Semantic roles & 50–950 ramp

primary

#28378E

secondary

#B7AA5B

accent

#C948DF

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #28378E

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

Preview Lab → · Contrast checker → · Palette generator →