#428FC4#428FC4

#428FC4 is a light, moderate cyan. Relative luminance 0.248; OKLCH L 62.5% C 0.110 H 241.7°. Best body text is #000000 at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#428FC4
RGB	rgb(66, 143, 196)
HSL	hsl(204, 52%, 51%)
HSV	hsv(204, 66%, 77%)
CMYK	cmyk(66.3%, 27%, 0%, 23.1%)
CIE-LAB	lab(56.87, -6.95, -34.45)
CIE-LCH	lch(56.87, 35.15, 258.60°)
OKLab	oklab(62.47% -0.0524 -0.0971)
OKLCH	oklch(62.47% 0.11 241.7)
XYZ	xyz(22.0292, 24.7864, 55.8371)
Luminance	0.2479 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC4 #C47742

analogous

#42C4B8 #428FC4 #424EC4

triadic

#428FC4 #C4428F #8FC442

tetradic

#428FC4 #B842C4 #C47742 #4EC442

square

#428FC4 #B842C4 #C47742 #4EC442

split-complementary

#428FC4 #C4424E #C4B842

monochromatic

#214D6A #306E99 #428FC4 #71ABD3 #9FC6E1

Accessibility & contrast

On white

3.52

#428FC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.96

#428FC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC4

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC4	#FFFFFF	#000000	##000000
##428FC4	1.00	3.52	5.96	5.96
#FFFFFF	3.52	1.00	21.00	21.00
#000000	5.96	21.00	1.00	1.00
##000000	5.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7790C6

Deuteranopia (green-blind)

#6583C3

Tritanopia (blue-blind)

#009CA1

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fc4;
/* rgb */ color: rgb(66, 143, 196);
/* oklch */ color: oklch(62.5% 0.110 241.7);

Tailwind

colors: {
  custom: {
    50: '#84afd6',
    500: '#428fc4',
    950: '#000000',
  },
}

SCSS

$custom: #428fc4;
$custom-light: #84afd6;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc4",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 196
  },
  "hsl": {
    "h": 204.462,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.62472,
    "c": 0.11029,
    "h": 241.7
  },
  "luminance": 0.24789
}

Semantic roles & 50–950 ramp

primary

#428FC4

secondary

#CEAC94

accent

#874CDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC4

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

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