#28378F#28378F

#28378F is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.146 H 270.5°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#28378F
RGB	rgb(40, 55, 143)
HSL	hsl(231, 56%, 36%)
HSV	hsv(231, 72%, 56%)
CMYK	cmyk(72%, 61.5%, 0%, 43.9%)
CIE-LAB	lab(27.20, 25.32, -50.54)
CIE-LCH	lch(27.20, 56.53, 296.61°)
OKLab	oklab(38.23% 0.0012 -0.1458)
OKLCH	oklch(38.23% 0.146 270.5)
XYZ	xyz(7.1975, 5.1659, 26.5991)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28378F #8F8028

analogous

#286A8F #28378F #4C288F

triadic

#28378F #8F2837 #378F28

tetradic

#28378F #8F286A #8F8028 #288F4C

square

#28378F #8F286A #8F8028 #288F4C

split-complementary

#28378F #8F4C28 #6A8F28

monochromatic

#0D122F #1B255F #28378F #3549BF #5F70D2

Accessibility & contrast

On white

10.33

#28378F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#28378F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28378F

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28378F	#FFFFFF	#000000	##FFFFFF
##28378F	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004592

Deuteranopia (green-blind)

#003C8D

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #28378f;
/* rgb */ color: rgb(40, 55, 143);
/* oklch */ color: oklch(38.2% 0.146 270.5);

Tailwind

colors: {
  custom: {
    50: '#716db1',
    500: '#28378f',
    950: '#000000',
  },
}

SCSS

$custom: #28378f;
$custom-light: #716db1;
$custom-dark: #000000;

JSON

{
  "hex": "#28378f",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 143
  },
  "hsl": {
    "h": 231.262,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.38231,
    "c": 0.14581,
    "h": 270.5
  },
  "luminance": 0.05167
}

Semantic roles & 50–950 ramp

primary

#28378F

secondary

#B8AA5B

accent

#CA48E0

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #28378F

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

Preview Lab → · Contrast checker → · Palette generator →