#428CC4#428CC4

#428CC4 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.8% C 0.112 H 244.0°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#428CC4
RGB	rgb(66, 140, 196)
HSL	hsl(206, 52%, 51%)
HSV	hsv(206, 66%, 77%)
CMYK	cmyk(66.3%, 28.6%, 0%, 23.1%)
CIE-LAB	lab(55.99, -5.23, -35.83)
CIE-LCH	lch(55.99, 36.21, 261.70°)
OKLab	oklab(61.78% -0.0493 -0.1011)
OKLCH	oklch(61.78% 0.112 244)
XYZ	xyz(21.5849, 23.8977, 55.6890)
Luminance	0.2390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC4 #C47A42

analogous

#42C4BB #428CC4 #424BC4

triadic

#428CC4 #C4428C #8CC442

tetradic

#428CC4 #BB42C4 #C47A42 #4BC442

square

#428CC4 #BB42C4 #C47A42 #4BC442

split-complementary

#428CC4 #C4424B #C4BB42

monochromatic

#214B6A #306C99 #428CC4 #71A8D3 #9FC5E1

Accessibility & contrast

On white

3.63

#428CC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#428CC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC4

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC4	#FFFFFF	#000000	##000000
##428CC4	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#738DC6

Deuteranopia (green-blind)

#6181C3

Tritanopia (blue-blind)

#009AA0

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428cc4;
/* rgb */ color: rgb(66, 140, 196);
/* oklch */ color: oklch(61.8% 0.112 244.0);

Tailwind

colors: {
  custom: {
    50: '#84add6',
    500: '#428cc4',
    950: '#000000',
  },
}

SCSS

$custom: #428cc4;
$custom-light: #84add6;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 196
  },
  "hsl": {
    "h": 205.846,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.61775,
    "c": 0.11245,
    "h": 244
  },
  "luminance": 0.239
}

Semantic roles & 50–950 ramp

primary

#428CC4

secondary

#CEAD94

accent

#8A4CDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428CC4

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

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