#28288B#28288B

#28288B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.1% C 0.159 H 274.5°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#28288B
RGB	rgb(40, 40, 139)
HSL	hsl(240, 55%, 35%)
HSV	hsv(240, 71%, 55%)
CMYK	cmyk(71.2%, 71.2%, 0%, 45.5%)
CIE-LAB	lab(23.11, 33.70, -54.76)
CIE-LCH	lch(23.11, 64.30, 301.61°)
OKLab	oklab(35.13% 0.0126 -0.1582)
OKLCH	oklch(35.13% 0.159 274.5)
XYZ	xyz(6.2925, 3.8322, 24.8292)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28288B #8B8B28

analogous

#28598B #28288B #59288B

triadic

#28288B #8B2828 #288B28

tetradic

#28288B #8B2859 #8B8B28 #288B59

square

#28288B #8B2859 #8B8B28 #288B59

split-complementary

#28288B #8B5928 #598B28

monochromatic

#0D0D2C #1A1A5B #28288B #3636BB #5D5DD0

Accessibility & contrast

On white

11.89

#28288B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#28288B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28288B

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28288B	#FFFFFF	#000000	##FFFFFF
##28288B	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003289

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #28288b;
/* rgb */ color: rgb(40, 40, 139);
/* oklch */ color: oklch(35.1% 0.159 274.5);

Tailwind

colors: {
  custom: {
    50: '#7163ae',
    500: '#28288b',
    950: '#000000',
  },
}

SCSS

$custom: #28288b;
$custom-light: #7163ae;
$custom-dark: #000000;

JSON

{
  "hex": "#28288b",
  "rgb": {
    "r": 40,
    "g": 40,
    "b": 139
  },
  "hsl": {
    "h": 240,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.35125,
    "c": 0.15875,
    "h": 274.5
  },
  "luminance": 0.03833
}

Semantic roles & 50–950 ramp

primary

#28288B

secondary

#B6B659

accent

#DF49DF

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#090510

muted

#7B797F

Preview Lab

Preview with #28288B

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

Preview Lab → · Contrast checker → · Palette generator →