#28188D#28188D

#28188D is a dark, vivid blue. Relative luminance 0.030; OKLCH L 33.1% C 0.177 H 276.7°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Color values

HEX	#28188D
RGB	rgb(40, 24, 141)
HSL	hsl(248, 71%, 32%)
HSV	hsv(248, 83%, 55%)
CMYK	cmyk(71.6%, 83%, 0%, 44.7%)
CIE-LAB	lab(20.15, 43.35, -60.89)
CIE-LCH	lch(20.15, 74.74, 305.45°)
OKLab	oklab(33.1% 0.0208 -0.176)
OKLCH	oklch(33.1% 0.177 276.7)
XYZ	xyz(6.0079, 3.0269, 25.4618)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28188D #7D8D18

analogous

#18438D #28188D #62188D

triadic

#28188D #8D2818 #188D28

tetradic

#28188D #8D1843 #7D8D18 #188D62

square

#28188D #8D1843 #7D8D18 #188D62

split-complementary

#28188D #8D6218 #438D18

monochromatic

#0A0624 #190F59 #28188D #3721C1 #5641DF

Accessibility & contrast

On white

13.08

#28188D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#28188D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28188D

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28188D	#FFFFFF	#000000	##FFFFFF
##28188D	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#002C8B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #28188d;
/* rgb */ color: rgb(40, 24, 141);
/* oklch */ color: oklch(33.1% 0.177 276.7);

Tailwind

colors: {
  custom: {
    50: '#7359b0',
    500: '#28188d',
    950: '#000000',
  },
}

SCSS

$custom: #28188d;
$custom-light: #7359b0;
$custom-dark: #000000;

JSON

{
  "hex": "#28188d",
  "rgb": {
    "r": 40,
    "g": 24,
    "b": 141
  },
  "hsl": {
    "h": 248.205,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.33101,
    "c": 0.17719,
    "h": 276.7
  },
  "luminance": 0.03027
}

Semantic roles & 50–950 ramp

primary

#28188D

secondary

#AEBF42

accent

#EE3AD5

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #28188D

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

Preview Lab → · Contrast checker → · Palette generator →