#28308A#28308A

#28308A is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.4% C 0.148 H 272.7°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#28308A
RGB	rgb(40, 48, 138)
HSL	hsl(235, 55%, 35%)
HSV	hsv(235, 71%, 54%)
CMYK	cmyk(71%, 65.2%, 0%, 45.9%)
CIE-LAB	lab(24.95, 28.15, -51.12)
CIE-LCH	lch(24.95, 58.35, 298.84°)
OKLab	oklab(36.43% 0.0069 -0.1476)
OKLCH	oklch(36.43% 0.148 272.7)
XYZ	xyz(6.5179, 4.3994, 24.5455)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28308A #8A8228

analogous

#28618A #28308A #51288A

triadic

#28308A #8A2830 #308A28

tetradic

#28308A #8A2861 #8A8228 #288A51

square

#28308A #8A2861 #8A8228 #288A51

split-complementary

#28308A #8A5128 #618A28

monochromatic

#0C0F2B #1A1F5B #28308A #3641B9 #5D66D0

Accessibility & contrast

On white

11.17

#28308A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#28308A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28308A

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28308A	#FFFFFF	#000000	##FFFFFF
##28308A	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408D

Deuteranopia (green-blind)

#003788

Tritanopia (blue-blind)

#004758

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #28308a;
/* rgb */ color: rgb(40, 48, 138);
/* oklch */ color: oklch(36.4% 0.148 272.7);

Tailwind

colors: {
  custom: {
    50: '#7068ad',
    500: '#28308a',
    950: '#000000',
  },
}

SCSS

$custom: #28308a;
$custom-light: #7068ad;
$custom-dark: #000000;

JSON

{
  "hex": "#28308a",
  "rgb": {
    "r": 40,
    "g": 48,
    "b": 138
  },
  "hsl": {
    "h": 235.102,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.36434,
    "c": 0.14772,
    "h": 272.7
  },
  "luminance": 0.044
}

Semantic roles & 50–950 ramp

primary

#28308A

secondary

#B5AE59

accent

#D249DE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #28308A

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

Preview Lab → · Contrast checker → · Palette generator →