#28237B#28237B

#28237B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.7% C 0.143 H 277.5°. Best body text is #FFFFFF at 12.99:1 contrast (WCAG AA passes).

Color values

HEX	#28237B
RGB	rgb(40, 35, 123)
HSL	hsl(243, 56%, 31%)
HSV	hsv(243, 72%, 48%)
CMYK	cmyk(67.5%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(20.37, 31.19, -49.18)
CIE-LCH	lch(20.37, 58.23, 302.39°)
OKLab	oklab(32.67% 0.0186 -0.1419)
OKLCH	oklch(32.67% 0.143 277.5)
XYZ	xyz(5.0501, 3.0828, 19.0640)
Luminance	0.0308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28237B #767B23

analogous

#234A7B #28237B #54237B

triadic

#28237B #7B2823 #237B28

tetradic

#28237B #7B234A #767B23 #237B54

square

#28237B #7B234A #767B23 #237B54

split-complementary

#28237B #7B5423 #4A7B23

monochromatic

#09081C #19154B #28237B #3731AB #544CCC

Accessibility & contrast

On white

12.99

#28237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#28237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28237B

12.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28237B	#FFFFFF	#000000	##FFFFFF
##28237B	1.00	12.99	1.62	12.99
#FFFFFF	12.99	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #28237b;
/* rgb */ color: rgb(40, 35, 123);
/* oklch */ color: oklch(32.7% 0.143 277.5);

Tailwind

colors: {
  custom: {
    50: '#6e5fa2',
    500: '#28237b',
    950: '#000000',
  },
}

SCSS

$custom: #28237b;
$custom-light: #6e5fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#28237b",
  "rgb": {
    "r": 40,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 243.409,
    "s": 55.696,
    "l": 30.98
  },
  "oklch": {
    "l": 0.32675,
    "c": 0.14313,
    "h": 277.5
  },
  "luminance": 0.03083
}

Semantic roles & 50–950 ramp

primary

#28237B

secondary

#A8AE4C

accent

#DF49D6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #28237B

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

Preview Lab → · Contrast checker → · Palette generator →