#428FCC#428FCC

#428FCC is a light, moderate cyan. Relative luminance 0.252; OKLCH L 62.9% C 0.119 H 245.3°. Best body text is #000000 at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#428FCC
RGB	rgb(66, 143, 204)
HSL	hsl(207, 58%, 53%)
HSV	hsv(207, 68%, 80%)
CMYK	cmyk(67.6%, 29.9%, 0%, 20%)
CIE-LAB	lab(57.23, -4.24, -38.40)
CIE-LCH	lch(57.23, 38.63, 263.70°)
OKLab	oklab(62.88% -0.0499 -0.1085)
OKLCH	oklch(62.88% 0.119 245.3)
XYZ	xyz(22.9642, 25.1604, 60.7612)
Luminance	0.2516 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FCC #CC7F42

analogous

#42CCC4 #428FCC #424ACC

triadic

#428FCC #CC428F #8FCC42

tetradic

#428FCC #C442CC #CC7F42 #4ACC42

square

#428FCC #C442CC #CC7F42 #4ACC42

split-complementary

#428FCC #CC424A #CCC442

monochromatic

#1F4F74 #2C6FA4 #428FCC #72ACD9 #A2C8E6

Accessibility & contrast

On white

3.48

#428FCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.03

#428FCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FCC

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FCC	#FFFFFF	#000000	##000000
##428FCC	1.00	3.48	6.03	6.03
#FFFFFF	3.48	1.00	21.00	21.00
#000000	6.03	21.00	1.00	1.00
##000000	6.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7491CF

Deuteranopia (green-blind)

#6183CB

Tritanopia (blue-blind)

#009EA4

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428fcc;
/* rgb */ color: rgb(66, 143, 204);
/* oklch */ color: oklch(62.9% 0.119 245.3);

Tailwind

colors: {
  custom: {
    50: '#85afdc',
    500: '#428fcc',
    950: '#000000',
  },
}

SCSS

$custom: #428fcc;
$custom-light: #85afdc;
$custom-dark: #000000;

JSON

{
  "hex": "#428fcc",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 204
  },
  "hsl": {
    "h": 206.522,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.6288,
    "c": 0.11941,
    "h": 245.3
  },
  "luminance": 0.25163
}

Semantic roles & 50–950 ramp

primary

#428FCC

secondary

#D3B197

accent

#8B47E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428FCC

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

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