#428CC9#428CC9

#428CC9 is a light, moderate cyan. Relative luminance 0.241; OKLCH L 62.0% C 0.118 H 246.2°. Best body text is #000000 at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#428CC9
RGB	rgb(66, 140, 201)
HSL	hsl(207, 56%, 52%)
HSV	hsv(207, 67%, 79%)
CMYK	cmyk(67.2%, 30.3%, 0%, 21.2%)
CIE-LAB	lab(56.22, -3.53, -38.30)
CIE-LCH	lch(56.22, 38.46, 264.74°)
OKLab	oklab(62.03% -0.0477 -0.1082)
OKLCH	oklch(62.03% 0.118 246.2)
XYZ	xyz(22.1635, 24.1291, 58.7364)
Luminance	0.2413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC9 #C97F42

analogous

#42C9C3 #428CC9 #4248C9

triadic

#428CC9 #C9428C #8CC942

tetradic

#428CC9 #C342C9 #C97F42 #48C942

square

#428CC9 #C342C9 #C97F42 #48C942

split-complementary

#428CC9 #C94248 #C9C342

monochromatic

#204C70 #2E6CA0 #428CC9 #72A9D7 #A1C6E4

Accessibility & contrast

On white

3.60

#428CC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.83

#428CC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC9

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC9	#FFFFFF	#000000	##000000
##428CC9	1.00	3.60	5.83	5.83
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.83	21.00	1.00	1.00
##000000	5.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718ECC

Deuteranopia (green-blind)

#5E81C8

Tritanopia (blue-blind)

#009BA2

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428cc9;
/* rgb */ color: rgb(66, 140, 201);
/* oklch */ color: oklch(62.0% 0.118 246.2);

Tailwind

colors: {
  custom: {
    50: '#85add9',
    500: '#428cc9',
    950: '#000000',
  },
}

SCSS

$custom: #428cc9;
$custom-light: #85add9;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc9",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 201
  },
  "hsl": {
    "h": 207.111,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.62034,
    "c": 0.1183,
    "h": 246.2
  },
  "luminance": 0.24131
}

Semantic roles & 50–950 ramp

primary

#428CC9

secondary

#D1B196

accent

#8D49DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428CC9

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

Preview Lab → · Contrast checker → · Palette generator →