#428EC4#428EC4

#428EC4 is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.2% C 0.111 H 242.4°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#428EC4
RGB	rgb(66, 142, 196)
HSL	hsl(205, 52%, 51%)
HSV	hsv(205, 66%, 77%)
CMYK	cmyk(66.3%, 27.6%, 0%, 23.1%)
CIE-LAB	lab(56.57, -6.38, -34.91)
CIE-LCH	lch(56.57, 35.49, 259.65°)
OKLab	oklab(62.24% -0.0513 -0.0984)
OKLCH	oklch(62.24% 0.111 242.4)
XYZ	xyz(21.8798, 24.4875, 55.7873)
Luminance	0.2449 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC4 #C47842

analogous

#42C4B9 #428EC4 #424DC4

triadic

#428EC4 #C4428E #8EC442

tetradic

#428EC4 #B942C4 #C47842 #4DC442

square

#428EC4 #B942C4 #C47842 #4DC442

split-complementary

#428EC4 #C4424D #C4B942

monochromatic

#214C6A #306D99 #428EC4 #71AAD3 #9FC6E1

Accessibility & contrast

On white

3.56

#428EC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#428EC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC4

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC4	#FFFFFF	#000000	##000000
##428EC4	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#768FC6

Deuteranopia (green-blind)

#6482C3

Tritanopia (blue-blind)

#009BA1

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428ec4;
/* rgb */ color: rgb(66, 142, 196);
/* oklch */ color: oklch(62.2% 0.111 242.4);

Tailwind

colors: {
  custom: {
    50: '#84aed6',
    500: '#428ec4',
    950: '#000000',
  },
}

SCSS

$custom: #428ec4;
$custom-light: #84aed6;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec4",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 196
  },
  "hsl": {
    "h": 204.923,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.62239,
    "c": 0.11099,
    "h": 242.4
  },
  "luminance": 0.2449
}

Semantic roles & 50–950 ramp

primary

#428EC4

secondary

#CEAC94

accent

#884CDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428EC4

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

Preview Lab → · Contrast checker → · Palette generator →