#428DC4#428DC4

#428DC4 is a light, moderate cyan. Relative luminance 0.242; OKLCH L 62.0% C 0.112 H 243.2°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#428DC4
RGB	rgb(66, 141, 196)
HSL	hsl(205, 52%, 51%)
HSV	hsv(205, 66%, 77%)
CMYK	cmyk(66.3%, 28.1%, 0%, 23.1%)
CIE-LAB	lab(56.28, -5.80, -35.37)
CIE-LCH	lch(56.28, 35.84, 260.68°)
OKLab	oklab(62.01% -0.0503 -0.0997)
OKLCH	oklch(62.01% 0.112 243.2)
XYZ	xyz(21.7317, 24.1913, 55.7379)
Luminance	0.2419 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DC4 #C47942

analogous

#42C4BA #428DC4 #424CC4

triadic

#428DC4 #C4428D #8DC442

tetradic

#428DC4 #BA42C4 #C47942 #4CC442

square

#428DC4 #BA42C4 #C47942 #4CC442

split-complementary

#428DC4 #C4424C #C4BA42

monochromatic

#214B6A #306C99 #428DC4 #71A9D3 #9FC5E1

Accessibility & contrast

On white

3.60

#428DC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#428DC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DC4

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DC4	#FFFFFF	#000000	##000000
##428DC4	1.00	3.60	5.84	5.84
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#748EC6

Deuteranopia (green-blind)

#6281C3

Tritanopia (blue-blind)

#009AA0

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428dc4;
/* rgb */ color: rgb(66, 141, 196);
/* oklch */ color: oklch(62.0% 0.112 243.2);

Tailwind

colors: {
  custom: {
    50: '#84aed6',
    500: '#428dc4',
    950: '#000000',
  },
}

SCSS

$custom: #428dc4;
$custom-light: #84aed6;
$custom-dark: #000000;

JSON

{
  "hex": "#428dc4",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 196
  },
  "hsl": {
    "h": 205.385,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.62007,
    "c": 0.1117,
    "h": 243.2
  },
  "luminance": 0.24194
}

Semantic roles & 50–950 ramp

primary

#428DC4

secondary

#CEAC94

accent

#894CDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428DC4

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

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