#28187B#28187B

#28187B is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.0% C 0.155 H 279.7°. Best body text is #FFFFFF at 13.94:1 contrast (WCAG AA passes).

Color values

HEX	#28187B
RGB	rgb(40, 24, 123)
HSL	hsl(250, 67%, 29%)
HSV	hsv(250, 80%, 48%)
CMYK	cmyk(67.5%, 80.5%, 0%, 51.8%)
CIE-LAB	lab(18.07, 37.64, -52.96)
CIE-LCH	lch(18.07, 64.98, 305.40°)
OKLab	oklab(31.04% 0.0261 -0.1529)
OKLCH	oklch(31.04% 0.155 279.7)
XYZ	xyz(4.7757, 2.5341, 18.9725)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28187B #6B7B18

analogous

#183A7B #28187B #5A187B

triadic

#28187B #7B2818 #187B28

tetradic

#28187B #7B183A #6B7B18 #187B5A

square

#28187B #7B183A #6B7B18 #187B5A

split-complementary

#28187B #7B5A18 #3A7B18

monochromatic

#08051A #170E48 #28187B #3922AE #5036D8

Accessibility & contrast

On white

13.94

#28187B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#28187B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28187B

13.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28187B	#FFFFFF	#000000	##FFFFFF
##28187B	1.00	13.94	1.51	13.94
#FFFFFF	13.94	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307E

Deuteranopia (green-blind)

#002879

Tritanopia (blue-blind)

#003549

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #28187b;
/* rgb */ color: rgb(40, 24, 123);
/* oklch */ color: oklch(31.0% 0.155 279.7);

Tailwind

colors: {
  custom: {
    50: '#6f58a2',
    500: '#28187b',
    950: '#000000',
  },
}

SCSS

$custom: #28187b;
$custom-light: #6f58a2;
$custom-dark: #000000;

JSON

{
  "hex": "#28187b",
  "rgb": {
    "r": 40,
    "g": 24,
    "b": 123
  },
  "hsl": {
    "h": 249.697,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31043,
    "c": 0.15513,
    "h": 279.7
  },
  "luminance": 0.02534
}

Semantic roles & 50–950 ramp

primary

#28187B

secondary

#9DB03F

accent

#EA3ECE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #28187B

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

Preview Lab → · Contrast checker → · Palette generator →