#28399E#28399E

#28399E is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.0% C 0.164 H 269.8°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#28399E
RGB	rgb(40, 57, 158)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 62%)
CMYK	cmyk(74.7%, 63.9%, 0%, 38%)
CIE-LAB	lab(29.02, 29.62, -56.75)
CIE-LCH	lch(29.02, 64.02, 297.56°)
OKLab	oklab(39.98% -0.0006 -0.164)
OKLCH	oklch(39.98% 0.164 269.8)
XYZ	xyz(8.5076, 5.8451, 33.0210)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28399E #9E8D28

analogous

#28749E #28399E #52289E

triadic

#28399E #9E2839 #399E28

tetradic

#28399E #9E2874 #9E8D28 #289E52

square

#28399E #9E2874 #9E8D28 #289E52

split-complementary

#28399E #9E5228 #749E28

monochromatic

#0F163C #1C276D #28399E #374CCC #6878D9

Accessibility & contrast

On white

9.68

#28399E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#28399E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28399E

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28399E	#FFFFFF	#000000	##FFFFFF
##28399E	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA1

Deuteranopia (green-blind)

#003F9C

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #28399e;
/* rgb */ color: rgb(40, 57, 158);
/* oklch */ color: oklch(40.0% 0.164 269.8);

Tailwind

colors: {
  custom: {
    50: '#746fbc',
    500: '#28399e',
    950: '#000000',
  },
}

SCSS

$custom: #28399e;
$custom-light: #746fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#28399e",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 158
  },
  "hsl": {
    "h": 231.356,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.39976,
    "c": 0.16401,
    "h": 269.8
  },
  "luminance": 0.05846
}

Semantic roles & 50–950 ramp

primary

#28399E

secondary

#BFB263

accent

#CC45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #28399E

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

Preview Lab → · Contrast checker → · Palette generator →