#28399D#28399D

#28399D is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.163 H 269.8°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#28399D
RGB	rgb(40, 57, 157)
HSL	hsl(231, 59%, 39%)
HSV	hsv(231, 75%, 62%)
CMYK	cmyk(74.5%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(28.93, 29.24, -56.29)
CIE-LCH	lch(28.93, 63.43, 297.45°)
OKLab	oklab(39.88% -0.0005 -0.1626)
OKLCH	oklch(39.88% 0.163 269.8)
XYZ	xyz(8.4219, 5.8108, 32.5695)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28399D #9D8C28

analogous

#28739D #28399D #51289D

triadic

#28399D #9D2839 #399D28

tetradic

#28399D #9D2873 #9D8C28 #289D51

square

#28399D #9D2873 #9D8C28 #289D51

split-complementary

#28399D #9D5128 #739D28

monochromatic

#0F163B #1C276C #28399D #364CCC #6778D8

Accessibility & contrast

On white

9.71

#28399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#28399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28399D

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28399D	#FFFFFF	#000000	##FFFFFF
##28399D	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA0

Deuteranopia (green-blind)

#003F9B

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #28399d;
/* rgb */ color: rgb(40, 57, 157);
/* oklch */ color: oklch(39.9% 0.163 269.8);

Tailwind

colors: {
  custom: {
    50: '#746fbb',
    500: '#28399d',
    950: '#000000',
  },
}

SCSS

$custom: #28399d;
$custom-light: #746fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#28399d",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 231.282,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39883,
    "c": 0.16265,
    "h": 269.8
  },
  "luminance": 0.05812
}

Semantic roles & 50–950 ramp

primary

#28399D

secondary

#BEB162

accent

#CC45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #28399D

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

Preview Lab → · Contrast checker → · Palette generator →