#28318A#28318A

#28318A is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.6% C 0.146 H 272.4°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#28318A
RGB	rgb(40, 49, 138)
HSL	hsl(234, 55%, 35%)
HSV	hsv(234, 71%, 54%)
CMYK	cmyk(71%, 64.5%, 0%, 45.9%)
CIE-LAB	lab(25.21, 27.48, -50.70)
CIE-LCH	lch(25.21, 57.67, 298.46°)
OKLab	oklab(36.62% 0.0061 -0.1463)
OKLCH	oklch(36.62% 0.146 272.4)
XYZ	xyz(6.5593, 4.4821, 24.5593)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28318A #8A8128

analogous

#28628A #28318A #50288A

triadic

#28318A #8A2831 #318A28

tetradic

#28318A #8A2862 #8A8128 #288A50

square

#28318A #8A2862 #8A8128 #288A50

split-complementary

#28318A #8A5028 #628A28

monochromatic

#0C0F2B #1A205B #28318A #3642B9 #5D67D0

Accessibility & contrast

On white

11.07

#28318A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#28318A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28318A

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28318A	#FFFFFF	#000000	##FFFFFF
##28318A	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408D

Deuteranopia (green-blind)

#003788

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #28318a;
/* rgb */ color: rgb(40, 49, 138);
/* oklch */ color: oklch(36.6% 0.146 272.4);

Tailwind

colors: {
  custom: {
    50: '#7069ad',
    500: '#28318a',
    950: '#000000',
  },
}

SCSS

$custom: #28318a;
$custom-light: #7069ad;
$custom-dark: #000000;

JSON

{
  "hex": "#28318a",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 138
  },
  "hsl": {
    "h": 234.49,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.36622,
    "c": 0.14646,
    "h": 272.4
  },
  "luminance": 0.04483
}

Semantic roles & 50–950 ramp

primary

#28318A

secondary

#B5AD59

accent

#D149DE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #28318A

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

Preview Lab → · Contrast checker → · Palette generator →