#28428F#28428F

#28428F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.5% C 0.131 H 266.5°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#28428F
RGB	rgb(40, 66, 143)
HSL	hsl(225, 56%, 36%)
HSV	hsv(225, 72%, 56%)
CMYK	cmyk(72%, 53.8%, 0%, 43.9%)
CIE-LAB	lab(30.23, 17.82, -45.62)
CIE-LCH	lch(30.23, 48.98, 291.34°)
OKLab	oklab(40.5% -0.0081 -0.1312)
OKLCH	oklch(40.5% 0.131 266.5)
XYZ	xyz(7.7795, 6.3299, 26.7931)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28428F #8F7528

analogous

#28758F #28428F #41288F

triadic

#28428F #8F2842 #428F28

tetradic

#28428F #8F2875 #8F7528 #288F41

square

#28428F #8F2875 #8F7528 #288F41

split-complementary

#28428F #8F4128 #758F28

monochromatic

#0D162F #1B2C5F #28428F #3558BF #5F7CD2

Accessibility & contrast

On white

9.27

#28428F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#28428F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28428F

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28428F	#FFFFFF	#000000	##FFFFFF
##28428F	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4C92

Deuteranopia (green-blind)

#00438D

Tritanopia (blue-blind)

#005462

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #28428f;
/* rgb */ color: rgb(40, 66, 143);
/* oklch */ color: oklch(40.5% 0.131 266.5);

Tailwind

colors: {
  custom: {
    50: '#7075b0',
    500: '#28428f',
    950: '#000000',
  },
}

SCSS

$custom: #28428f;
$custom-light: #7075b0;
$custom-dark: #000000;

JSON

{
  "hex": "#28428f",
  "rgb": {
    "r": 40,
    "g": 66,
    "b": 143
  },
  "hsl": {
    "h": 224.854,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40501,
    "c": 0.13143,
    "h": 266.5
  },
  "luminance": 0.06331
}

Semantic roles & 50–950 ramp

primary

#28428F

secondary

#B8A05B

accent

#B948E0

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #28428F

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

Preview Lab → · Contrast checker → · Palette generator →