#428FC8#428FC8

#428FC8 is a light, moderate cyan. Relative luminance 0.250; OKLCH L 62.7% C 0.115 H 243.6°. Best body text is #000000 at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#428FC8
RGB	rgb(66, 143, 200)
HSL	hsl(206, 55%, 52%)
HSV	hsv(206, 67%, 78%)
CMYK	cmyk(67%, 28.5%, 0%, 21.6%)
CIE-LAB	lab(57.05, -5.60, -36.43)
CIE-LCH	lch(57.05, 36.86, 261.26°)
OKLab	oklab(62.67% -0.0511 -0.1028)
OKLCH	oklch(62.67% 0.115 243.6)
XYZ	xyz(22.4906, 24.9709, 58.2670)
Luminance	0.2497 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC8 #C87B42

analogous

#42C8BE #428FC8 #424CC8

triadic

#428FC8 #C8428F #8FC842

tetradic

#428FC8 #BE42C8 #C87B42 #4CC842

square

#428FC8 #BE42C8 #C87B42 #4CC842

split-complementary

#428FC8 #C8424C #C8BE42

monochromatic

#204E6F #2E6F9F #428FC8 #71ABD6 #A1C7E4

Accessibility & contrast

On white

3.50

#428FC8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.99

#428FC8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC8

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC8	#FFFFFF	#000000	##000000
##428FC8	1.00	3.50	5.99	5.99
#FFFFFF	3.50	1.00	21.00	21.00
#000000	5.99	21.00	1.00	1.00
##000000	5.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7590CB

Deuteranopia (green-blind)

#6383C7

Tritanopia (blue-blind)

#009DA3

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428fc8;
/* rgb */ color: rgb(66, 143, 200);
/* oklch */ color: oklch(62.7% 0.115 243.6);

Tailwind

colors: {
  custom: {
    50: '#84afd9',
    500: '#428fc8',
    950: '#000000',
  },
}

SCSS

$custom: #428fc8;
$custom-light: #84afd9;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc8",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 200
  },
  "hsl": {
    "h": 205.522,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.62674,
    "c": 0.11479,
    "h": 243.6
  },
  "luminance": 0.24973
}

Semantic roles & 50–950 ramp

primary

#428FC8

secondary

#D0AF96

accent

#894ADE

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC8

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

Preview Lab → · Contrast checker → · Palette generator →