#28337B#28337B

#28337B is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.7% C 0.122 H 272.1°. Best body text is #FFFFFF at 11.35:1 contrast (WCAG AA passes).

Color values

HEX	#28337B
RGB	rgb(40, 51, 123)
HSL	hsl(232, 51%, 32%)
HSV	hsv(232, 67%, 48%)
CMYK	cmyk(67.5%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(24.48, 20.48, -42.48)
CIE-LCH	lch(24.48, 47.16, 295.73°)
OKLab	oklab(35.69% 0.0045 -0.1222)
OKLCH	oklch(35.69% 0.122 272.1)
XYZ	xyz(5.6329, 4.2483, 19.2582)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28337B #7B7028

analogous

#285D7B #28337B #47287B

triadic

#28337B #7B2833 #337B28

tetradic

#28337B #7B285D #7B7028 #287B47

square

#28337B #7B285D #7B7028 #287B47

split-complementary

#28337B #7B4728 #5D7B28

monochromatic

#0A0D1F #19204D #28337B #3746A9 #5665C8

Accessibility & contrast

On white

11.35

#28337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#28337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28337B

11.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28337B	#FFFFFF	#000000	##FFFFFF
##28337B	1.00	11.35	1.85	11.35
#FFFFFF	11.35	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004451

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #28337b;
/* rgb */ color: rgb(40, 51, 123);
/* oklch */ color: oklch(35.7% 0.122 272.1);

Tailwind

colors: {
  custom: {
    50: '#6c6aa2',
    500: '#28337b',
    950: '#000000',
  },
}

SCSS

$custom: #28337b;
$custom-light: #6c6aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#28337b",
  "rgb": {
    "r": 40,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 232.048,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.35686,
    "c": 0.12224,
    "h": 272.1
  },
  "luminance": 0.04249
}

Semantic roles & 50–950 ramp

primary

#28337B

secondary

#ADA152

accent

#C84DDA

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#08060F

muted

#7A7A7F

Preview Lab

Preview with #28337B

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

Preview Lab → · Contrast checker → · Palette generator →