#428ED4#428ED4

#428ED4 is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.1% C 0.130 H 249.0°. Best body text is #000000 at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#428ED4
RGB	rgb(66, 142, 212)
HSL	hsl(209, 63%, 55%)
HSV	hsv(209, 69%, 83%)
CMYK	cmyk(68.9%, 33%, 0%, 16.9%)
CIE-LAB	lab(57.32, -0.90, -42.75)
CIE-LCH	lch(57.32, 42.76, 268.79°)
OKLab	oklab(63.08% -0.0466 -0.1212)
OKLCH	oklch(63.08% 0.13 249)
XYZ	xyz(23.7990, 25.2552, 65.8951)
Luminance	0.2526 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ED4 #D48842

analogous

#42D4D1 #428ED4 #4245D4

triadic

#428ED4 #D4428E #8ED442

tetradic

#428ED4 #D142D4 #D48842 #45D442

square

#428ED4 #D142D4 #D48842 #45D442

split-complementary

#428ED4 #D44245 #D4D142

monochromatic

#1D507F #286FB1 #428ED4 #74ACDF #A6CAEB

Accessibility & contrast

On white

3.47

#428ED4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.05

#428ED4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ED4

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ED4	#FFFFFF	#000000	##000000
##428ED4	1.00	3.47	6.05	6.05
#FFFFFF	3.47	1.00	21.00	21.00
#000000	6.05	21.00	1.00	1.00
##000000	6.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F91D7

Deuteranopia (green-blind)

#5A83D3

Tritanopia (blue-blind)

#009FA7

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ed4;
/* rgb */ color: rgb(66, 142, 212);
/* oklch */ color: oklch(63.1% 0.130 249.0);

Tailwind

colors: {
  custom: {
    50: '#86aee1',
    500: '#428ed4',
    950: '#000000',
  },
}

SCSS

$custom: #428ed4;
$custom-light: #86aee1;
$custom-dark: #000000;

JSON

{
  "hex": "#428ed4",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 212
  },
  "hsl": {
    "h": 208.767,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.63078,
    "c": 0.12983,
    "h": 249
  },
  "luminance": 0.25258
}

Semantic roles & 50–950 ramp

primary

#428ED4

secondary

#D8B89A

accent

#9142E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ED4

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

Preview Lab → · Contrast checker → · Palette generator →