#428FC9#428FC9

#428FC9 is a light, moderate cyan. Relative luminance 0.250; OKLCH L 62.7% C 0.116 H 244.0°. Best body text is #000000 at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#428FC9
RGB	rgb(66, 143, 201)
HSL	hsl(206, 56%, 52%)
HSV	hsv(206, 67%, 79%)
CMYK	cmyk(67.2%, 28.9%, 0%, 21.2%)
CIE-LAB	lab(57.09, -5.26, -36.92)
CIE-LCH	lch(57.09, 37.30, 261.89°)
OKLab	oklab(62.72% -0.0508 -0.1042)
OKLCH	oklch(62.72% 0.116 244)
XYZ	xyz(22.6078, 25.0178, 58.8845)
Luminance	0.2502 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC9 #C97C42

analogous

#42C9C0 #428FC9 #424BC9

triadic

#428FC9 #C9428F #8FC942

tetradic

#428FC9 #C042C9 #C97C42 #4BC942

square

#428FC9 #C042C9 #C97C42 #4BC942

split-complementary

#428FC9 #C9424B #C9C042

monochromatic

#204E70 #2E6FA0 #428FC9 #72ABD7 #A1C7E4

Accessibility & contrast

On white

3.50

#428FC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.00

#428FC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC9

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC9	#FFFFFF	#000000	##000000
##428FC9	1.00	3.50	6.00	6.00
#FFFFFF	3.50	1.00	21.00	21.00
#000000	6.00	21.00	1.00	1.00
##000000	6.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7590CC

Deuteranopia (green-blind)

#6283C8

Tritanopia (blue-blind)

#009DA3

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428fc9;
/* rgb */ color: rgb(66, 143, 201);
/* oklch */ color: oklch(62.7% 0.116 244.0);

Tailwind

colors: {
  custom: {
    50: '#85afd9',
    500: '#428fc9',
    950: '#000000',
  },
}

SCSS

$custom: #428fc9;
$custom-light: #85afd9;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc9",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 201
  },
  "hsl": {
    "h": 205.778,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.62725,
    "c": 0.11594,
    "h": 244
  },
  "luminance": 0.2502
}

Semantic roles & 50–950 ramp

primary

#428FC9

secondary

#D1AF96

accent

#8949DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC9

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

Preview Lab → · Contrast checker → · Palette generator →