#428CCD#428CCD

#428CCD is a light, vivid cyan. Relative luminance 0.243; OKLCH L 62.2% C 0.123 H 247.8°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#428CCD
RGB	rgb(66, 140, 205)
HSL	hsl(208, 58%, 53%)
HSV	hsv(208, 68%, 80%)
CMYK	cmyk(67.8%, 31.7%, 0%, 19.6%)
CIE-LAB	lab(56.41, -2.15, -40.26)
CIE-LCH	lch(56.41, 40.31, 266.94°)
OKLab	oklab(62.25% -0.0466 -0.1139)
OKLCH	oklch(62.25% 0.123 247.8)
XYZ	xyz(22.6402, 24.3198, 61.2468)
Luminance	0.2432 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CCD #CD8342

analogous

#42CDC9 #428CCD #4246CD

triadic

#428CCD #CD428C #8CCD42

tetradic

#428CCD #C942CD #CD8342 #46CD42

square

#428CCD #C942CD #CD8342 #46CD42

split-complementary

#428CCD #CD4246 #CDC942

monochromatic

#1F4D76 #2C6DA6 #428CCD #72A9DA #A3C7E7

Accessibility & contrast

On white

3.58

#428CCD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#428CCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CCD

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CCD	#FFFFFF	#000000	##000000
##428CCD	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F8FD0

Deuteranopia (green-blind)

#5C81CC

Tritanopia (blue-blind)

#009BA3

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ccd;
/* rgb */ color: rgb(66, 140, 205);
/* oklch */ color: oklch(62.2% 0.123 247.8);

Tailwind

colors: {
  custom: {
    50: '#85addc',
    500: '#428ccd',
    950: '#000000',
  },
}

SCSS

$custom: #428ccd;
$custom-light: #85addc;
$custom-dark: #000000;

JSON

{
  "hex": "#428ccd",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 205
  },
  "hsl": {
    "h": 208.058,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.62246,
    "c": 0.12309,
    "h": 247.8
  },
  "luminance": 0.24322
}

Semantic roles & 50–950 ramp

primary

#428CCD

secondary

#D3B397

accent

#8F46E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CCD

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

Preview Lab → · Contrast checker → · Palette generator →