#28178D#28178D

#28178D is a dark, vivid blue. Relative luminance 0.030; OKLCH L 33.0% C 0.178 H 276.9°. Best body text is #FFFFFF at 13.15:1 contrast (WCAG AA passes).

Color values

HEX	#28178D
RGB	rgb(40, 23, 141)
HSL	hsl(249, 72%, 32%)
HSV	hsv(249, 84%, 55%)
CMYK	cmyk(71.6%, 83.7%, 0%, 44.7%)
CIE-LAB	lab(19.99, 43.82, -61.16)
CIE-LCH	lch(19.99, 75.24, 305.62°)
OKLab	oklab(32.99% 0.0212 -0.1767)
OKLCH	oklch(32.99% 0.178 276.9)
XYZ	xyz(5.9876, 2.9864, 25.4550)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28178D #7C8D17

analogous

#17418D #28178D #63178D

triadic

#28178D #8D2817 #178D28

tetradic

#28178D #8D1741 #7C8D17 #178D63

square

#28178D #8D1741 #7C8D17 #178D63

split-complementary

#28178D #8D6317 #418D17

monochromatic

#0A0624 #190E58 #28178D #3720C2 #563FE0

Accessibility & contrast

On white

13.15

#28178D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#28178D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28178D

13.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28178D	#FFFFFF	#000000	##FFFFFF
##28178D	1.00	13.15	1.60	13.15
#FFFFFF	13.15	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#002B8B

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #28178d;
/* rgb */ color: rgb(40, 23, 141);
/* oklch */ color: oklch(33.0% 0.178 276.9);

Tailwind

colors: {
  custom: {
    50: '#7359b0',
    500: '#28178d',
    950: '#000000',
  },
}

SCSS

$custom: #28178d;
$custom-light: #7359b0;
$custom-dark: #000000;

JSON

{
  "hex": "#28178d",
  "rgb": {
    "r": 40,
    "g": 23,
    "b": 141
  },
  "hsl": {
    "h": 248.644,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32989,
    "c": 0.17799,
    "h": 276.9
  },
  "luminance": 0.02987
}

Semantic roles & 50–950 ramp

primary

#28178D

secondary

#ADC040

accent

#EF39D5

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #28178D

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

Preview Lab → · Contrast checker → · Palette generator →