#428FCE#428FCE

#428FCE is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.0% C 0.122 H 246.1°. Best body text is #000000 at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#428FCE
RGB	rgb(66, 143, 206)
HSL	hsl(207, 59%, 53%)
HSV	hsv(207, 68%, 81%)
CMYK	cmyk(68%, 30.6%, 0%, 19.2%)
CIE-LAB	lab(57.32, -3.55, -39.38)
CIE-LCH	lch(57.32, 39.54, 264.85°)
OKLab	oklab(62.99% -0.0493 -0.1113)
OKLCH	oklch(62.99% 0.122 246.1)
XYZ	xyz(23.2056, 25.2569, 62.0327)
Luminance	0.2526 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FCE #CE8142

analogous

#42CEC7 #428FCE #4249CE

triadic

#428FCE #CE428F #8FCE42

tetradic

#428FCE #C742CE #CE8142 #49CE42

square

#428FCE #C742CE #CE8142 #49CE42

split-complementary

#428FCE #CE4249 #CEC742

monochromatic

#1F4F77 #2B70A7 #428FCE #73ACDB #A3C9E7

Accessibility & contrast

On white

3.47

#428FCE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.05

#428FCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FCE

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FCE	#FFFFFF	#000000	##000000
##428FCE	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)

#7391D1

Deuteranopia (green-blind)

#6084CD

Tritanopia (blue-blind)

#009EA5

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428fce;
/* rgb */ color: rgb(66, 143, 206);
/* oklch */ color: oklch(63.0% 0.122 246.1);

Tailwind

colors: {
  custom: {
    50: '#85afdd',
    500: '#428fce',
    950: '#000000',
  },
}

SCSS

$custom: #428fce;
$custom-light: #85afdd;
$custom-dark: #000000;

JSON

{
  "hex": "#428fce",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 206
  },
  "hsl": {
    "h": 207,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.62985,
    "c": 0.12176,
    "h": 246.1
  },
  "luminance": 0.25259
}

Semantic roles & 50–950 ramp

primary

#428FCE

secondary

#D4B398

accent

#8C46E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FCE

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

Preview Lab → · Contrast checker → · Palette generator →