#28428B#28428B

#28428B is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.2% C 0.126 H 266.1°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#28428B
RGB	rgb(40, 66, 139)
HSL	hsl(224, 55%, 35%)
HSV	hsv(224, 71%, 55%)
CMYK	cmyk(71.2%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(29.94, 16.28, -43.63)
CIE-LCH	lch(29.94, 46.57, 290.46°)
OKLab	oklab(40.19% -0.0085 -0.1253)
OKLCH	oklch(40.19% 0.126 266.1)
XYZ	xyz(7.4819, 6.2109, 25.2256)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28428B #8B7128

analogous

#28748B #28428B #3F288B

triadic

#28428B #8B2842 #428B28

tetradic

#28428B #8B2874 #8B7128 #288B3F

square

#28428B #8B2874 #8B7128 #288B3F

split-complementary

#28428B #8B3F28 #748B28

monochromatic

#0D152C #1A2B5B #28428B #3659BB #5D7BD0

Accessibility & contrast

On white

9.36

#28428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#28428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28428B

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28428B	#FFFFFF	#000000	##FFFFFF
##28428B	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154B8E

Deuteranopia (green-blind)

#00428A

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #28428b;
/* rgb */ color: rgb(40, 66, 139);
/* oklch */ color: oklch(40.2% 0.126 266.1);

Tailwind

colors: {
  custom: {
    50: '#6f75ad',
    500: '#28428b',
    950: '#000000',
  },
}

SCSS

$custom: #28428b;
$custom-light: #6f75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#28428b",
  "rgb": {
    "r": 40,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 224.242,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.40187,
    "c": 0.12562,
    "h": 266.1
  },
  "luminance": 0.06212
}

Semantic roles & 50–950 ramp

primary

#28428B

secondary

#B69D59

accent

#B749DF

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #28428B

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

Preview Lab → · Contrast checker → · Palette generator →