#28508B#28508B

#28508B is a dark, moderate blue. Relative luminance 0.081; OKLCH L 43.4% C 0.108 H 258.1°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#28508B
RGB	rgb(40, 80, 139)
HSL	hsl(216, 55%, 35%)
HSV	hsv(216, 71%, 55%)
CMYK	cmyk(71.2%, 42.4%, 0%, 45.5%)
CIE-LAB	lab(34.09, 6.83, -36.97)
CIE-LCH	lch(34.09, 37.59, 280.47°)
OKLab	oklab(43.37% -0.0222 -0.1055)
OKLCH	oklch(43.37% 0.108 258.1)
XYZ	xyz(8.4022, 8.0516, 25.5324)
Luminance	0.0805 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28508B #8B6328

analogous

#28818B #28508B #32288B

triadic

#28508B #8B2850 #508B28

tetradic

#28508B #8B2881 #8B6328 #288B32

square

#28508B #8B2881 #8B6328 #288B32

split-complementary

#28508B #8B3228 #818B28

monochromatic

#0D192C #1A355B #28508B #366BBB #5D8CD0

Accessibility & contrast

On white

8.04

#28508B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#28508B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28508B

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28508B	#FFFFFF	#000000	##FFFFFF
##28508B	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34558D

Deuteranopia (green-blind)

#244C8A

Tritanopia (blue-blind)

#005E66

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #28508b;
/* rgb */ color: rgb(40, 80, 139);
/* oklch */ color: oklch(43.4% 0.108 258.1);

Tailwind

colors: {
  custom: {
    50: '#6e80ad',
    500: '#28508b',
    950: '#000000',
  },
}

SCSS

$custom: #28508b;
$custom-light: #6e80ad;
$custom-dark: #000000;

JSON

{
  "hex": "#28508b",
  "rgb": {
    "r": 40,
    "g": 80,
    "b": 139
  },
  "hsl": {
    "h": 215.758,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.43374,
    "c": 0.1078,
    "h": 258.1
  },
  "luminance": 0.08053
}

Semantic roles & 50–950 ramp

primary

#28508B

secondary

#B69059

accent

#A249DF

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080A10

muted

#7B7C7F

Preview Lab

Preview with #28508B

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

Preview Lab → · Contrast checker → · Palette generator →