#28188B#28188B

#28188B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.175 H 277.0°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#28188B
RGB	rgb(40, 24, 139)
HSL	hsl(248, 71%, 32%)
HSV	hsv(248, 83%, 55%)
CMYK	cmyk(71.2%, 82.7%, 0%, 45.5%)
CIE-LAB	lab(19.91, 42.72, -60.03)
CIE-LCH	lch(19.91, 73.68, 305.44°)
OKLab	oklab(32.87% 0.0214 -0.1735)
OKLCH	oklch(32.87% 0.175 277)
XYZ	xyz(5.8604, 2.9679, 24.6851)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28188B #7B8B18

analogous

#18428B #28188B #62188B

triadic

#28188B #8B2818 #188B28

tetradic

#28188B #8B1842 #7B8B18 #188B62

square

#28188B #8B1842 #7B8B18 #188B62

split-complementary

#28188B #8B6218 #428B18

monochromatic

#0A0623 #190F57 #28188B #3721BF #563FDE

Accessibility & contrast

On white

13.18

#28188B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#28188B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28188B

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28188B	#FFFFFF	#000000	##FFFFFF
##28188B	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002B89

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #28188b;
/* rgb */ color: rgb(40, 24, 139);
/* oklch */ color: oklch(32.9% 0.175 277.0);

Tailwind

colors: {
  custom: {
    50: '#7259ae',
    500: '#28188b',
    950: '#000000',
  },
}

SCSS

$custom: #28188b;
$custom-light: #7259ae;
$custom-dark: #000000;

JSON

{
  "hex": "#28188b",
  "rgb": {
    "r": 40,
    "g": 24,
    "b": 139
  },
  "hsl": {
    "h": 248.348,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32868,
    "c": 0.17479,
    "h": 277
  },
  "luminance": 0.02968
}

Semantic roles & 50–950 ramp

primary

#28188B

secondary

#ADBE40

accent

#ED3AD4

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #28188B

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

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