#28318B#28318B

#28318B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.7% C 0.148 H 272.4°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#28318B
RGB	rgb(40, 49, 139)
HSL	hsl(235, 55%, 35%)
HSV	hsv(235, 71%, 55%)
CMYK	cmyk(71.2%, 64.7%, 0%, 45.5%)
CIE-LAB	lab(25.29, 27.85, -51.18)
CIE-LCH	lch(25.29, 58.27, 298.56°)
OKLab	oklab(36.71% 0.0061 -0.1477)
OKLCH	oklch(36.71% 0.148 272.4)
XYZ	xyz(6.6320, 4.5112, 24.9423)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28318B #8B8228

analogous

#28638B #28318B #50288B

triadic

#28318B #8B2831 #318B28

tetradic

#28318B #8B2863 #8B8228 #288B50

square

#28318B #8B2863 #8B8228 #288B50

split-complementary

#28318B #8B5028 #638B28

monochromatic

#0D0F2C #1A205B #28318B #3642BB #5D68D0

Accessibility & contrast

On white

11.04

#28318B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#28318B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28318B

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28318B	#FFFFFF	#000000	##FFFFFF
##28318B	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418E

Deuteranopia (green-blind)

#003789

Tritanopia (blue-blind)

#004859

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #28318b;
/* rgb */ color: rgb(40, 49, 139);
/* oklch */ color: oklch(36.7% 0.148 272.4);

Tailwind

colors: {
  custom: {
    50: '#7069ae',
    500: '#28318b',
    950: '#000000',
  },
}

SCSS

$custom: #28318b;
$custom-light: #7069ae;
$custom-dark: #000000;

JSON

{
  "hex": "#28318b",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 139
  },
  "hsl": {
    "h": 234.545,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.36715,
    "c": 0.14785,
    "h": 272.4
  },
  "luminance": 0.04512
}

Semantic roles & 50–950 ramp

primary

#28318B

secondary

#B6AD59

accent

#D149DF

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #28318B

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

Preview Lab → · Contrast checker → · Palette generator →