#28188E#28188E

#28188E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.2% C 0.178 H 276.6°. Best body text is #FFFFFF at 13.03:1 contrast (WCAG AA passes).

Color values

HEX	#28188E
RGB	rgb(40, 24, 142)
HSL	hsl(248, 71%, 33%)
HSV	hsv(248, 83%, 56%)
CMYK	cmyk(71.8%, 83.1%, 0%, 44.3%)
CIE-LAB	lab(20.27, 43.66, -61.31)
CIE-LCH	lch(20.27, 75.27, 305.45°)
OKLab	oklab(33.22% 0.0205 -0.1772)
OKLCH	oklch(33.22% 0.178 276.6)
XYZ	xyz(6.0826, 3.0568, 25.8554)
Luminance	0.0306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28188E #7E8E18

analogous

#18438E #28188E #63188E

triadic

#28188E #8E2818 #188E28

tetradic

#28188E #8E1843 #7E8E18 #188E63

square

#28188E #8E1843 #7E8E18 #188E63

split-complementary

#28188E #8E6318 #438E18

monochromatic

#0B0625 #190F5A #28188E #3721C2 #5741DF

Accessibility & contrast

On white

13.03

#28188E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#28188E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28188E

13.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28188E	#FFFFFF	#000000	##FFFFFF
##28188E	1.00	13.03	1.61	13.03
#FFFFFF	13.03	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002C8C

Tritanopia (blue-blind)

#003D54

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #28188e;
/* rgb */ color: rgb(40, 24, 142);
/* oklch */ color: oklch(33.2% 0.178 276.6);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#28188e",
  "rgb": {
    "r": 40,
    "g": 24,
    "b": 142
  },
  "hsl": {
    "h": 248.136,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33217,
    "c": 0.17838,
    "h": 276.6
  },
  "luminance": 0.03057
}

Semantic roles & 50–950 ramp

primary

#28188E

secondary

#AFC042

accent

#EE3AD5

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #28188E

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

Preview Lab → · Contrast checker → · Palette generator →