#428DC9#428DC9

#428DC9 is a light, moderate cyan. Relative luminance 0.244; OKLCH L 62.3% C 0.117 H 245.5°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#428DC9
RGB	rgb(66, 141, 201)
HSL	hsl(207, 56%, 52%)
HSV	hsv(207, 67%, 79%)
CMYK	cmyk(67.2%, 29.9%, 0%, 21.2%)
CIE-LAB	lab(56.51, -4.11, -37.84)
CIE-LCH	lch(56.51, 38.06, 263.81°)
OKLab	oklab(62.26% -0.0488 -0.1069)
OKLCH	oklch(62.26% 0.118 245.5)
XYZ	xyz(22.3103, 24.4227, 58.7853)
Luminance	0.2442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DC9 #C97E42

analogous

#42C9C2 #428DC9 #4249C9

triadic

#428DC9 #C9428D #8DC942

tetradic

#428DC9 #C242C9 #C97E42 #49C942

square

#428DC9 #C242C9 #C97E42 #49C942

split-complementary

#428DC9 #C94249 #C9C242

monochromatic

#204D70 #2E6DA0 #428DC9 #72AAD7 #A1C6E4

Accessibility & contrast

On white

3.57

#428DC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#428DC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DC9

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DC9	#FFFFFF	#000000	##000000
##428DC9	1.00	3.57	5.89	5.89
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#728FCC

Deuteranopia (green-blind)

#6082C8

Tritanopia (blue-blind)

#009BA2

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428dc9;
/* rgb */ color: rgb(66, 141, 201);
/* oklch */ color: oklch(62.3% 0.117 245.5);

Tailwind

colors: {
  custom: {
    50: '#85aed9',
    500: '#428dc9',
    950: '#000000',
  },
}

SCSS

$custom: #428dc9;
$custom-light: #85aed9;
$custom-dark: #000000;

JSON

{
  "hex": "#428dc9",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 201
  },
  "hsl": {
    "h": 206.667,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.62264,
    "c": 0.1175,
    "h": 245.5
  },
  "luminance": 0.24425
}

Semantic roles & 50–950 ramp

primary

#428DC9

secondary

#D1B096

accent

#8C49DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428DC9

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

Preview Lab → · Contrast checker → · Palette generator →