#428EC9#428EC9

#428EC9 is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.5% C 0.117 H 244.8°. Best body text is #000000 at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#428EC9
RGB	rgb(66, 142, 201)
HSL	hsl(206, 56%, 52%)
HSV	hsv(206, 67%, 79%)
CMYK	cmyk(67.2%, 29.4%, 0%, 21.2%)
CIE-LAB	lab(56.80, -4.68, -37.38)
CIE-LCH	lch(56.80, 37.67, 262.86°)
OKLab	oklab(62.49% -0.0498 -0.1056)
OKLCH	oklch(62.49% 0.117 244.8)
XYZ	xyz(22.4584, 24.7189, 58.8347)
Luminance	0.2472 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC9 #C97D42

analogous

#42C9C1 #428EC9 #424BC9

triadic

#428EC9 #C9428E #8EC942

tetradic

#428EC9 #C142C9 #C97D42 #4BC942

square

#428EC9 #C142C9 #C97D42 #4BC942

split-complementary

#428EC9 #C9424B #C9C142

monochromatic

#204D70 #2E6EA0 #428EC9 #72AAD7 #A1C7E4

Accessibility & contrast

On white

3.53

#428EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.94

#428EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC9

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC9	#FFFFFF	#000000	##000000
##428EC9	1.00	3.53	5.94	5.94
#FFFFFF	3.53	1.00	21.00	21.00
#000000	5.94	21.00	1.00	1.00
##000000	5.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7490CC

Deuteranopia (green-blind)

#6182C8

Tritanopia (blue-blind)

#009CA3

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428ec9;
/* rgb */ color: rgb(66, 142, 201);
/* oklch */ color: oklch(62.5% 0.117 244.8);

Tailwind

colors: {
  custom: {
    50: '#85aed9',
    500: '#428ec9',
    950: '#000000',
  },
}

SCSS

$custom: #428ec9;
$custom-light: #85aed9;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec9",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 201
  },
  "hsl": {
    "h": 206.222,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.62494,
    "c": 0.1167,
    "h": 244.8
  },
  "luminance": 0.24721
}

Semantic roles & 50–950 ramp

primary

#428EC9

secondary

#D1B096

accent

#8A49DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428EC9

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

Preview Lab → · Contrast checker → · Palette generator →