#428AC9#428AC9

#428AC9 is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.6% C 0.120 H 247.6°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#428AC9
RGB	rgb(66, 138, 201)
HSL	hsl(208, 56%, 52%)
HSV	hsv(208, 67%, 79%)
CMYK	cmyk(67.2%, 31.3%, 0%, 21.2%)
CIE-LAB	lab(55.63, -2.36, -39.21)
CIE-LCH	lch(55.63, 39.28, 266.55°)
OKLab	oklab(61.58% -0.0457 -0.1109)
OKLCH	oklch(61.58% 0.12 247.6)
XYZ	xyz(21.8739, 23.5500, 58.6398)
Luminance	0.2355 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AC9 #C98142

analogous

#42C9C5 #428AC9 #4246C9

triadic

#428AC9 #C9428A #8AC942

tetradic

#428AC9 #C542C9 #C98142 #46C942

square

#428AC9 #C542C9 #C98142 #46C942

split-complementary

#428AC9 #C94246 #C9C542

monochromatic

#204B70 #2E6BA0 #428AC9 #72A7D7 #A1C5E4

Accessibility & contrast

On white

3.68

#428AC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.71

#428AC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AC9

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AC9	#FFFFFF	#000000	##000000
##428AC9	1.00	3.68	5.71	5.71
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.71	21.00	1.00	1.00
##000000	5.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E8CCC

Deuteranopia (green-blind)

#5B7FC8

Tritanopia (blue-blind)

#0099A0

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428ac9;
/* rgb */ color: rgb(66, 138, 201);
/* oklch */ color: oklch(61.6% 0.120 247.6);

Tailwind

colors: {
  custom: {
    50: '#85abd9',
    500: '#428ac9',
    950: '#000000',
  },
}

SCSS

$custom: #428ac9;
$custom-light: #85abd9;
$custom-dark: #000000;

JSON

{
  "hex": "#428ac9",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 201
  },
  "hsl": {
    "h": 208,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.61575,
    "c": 0.11997,
    "h": 247.6
  },
  "luminance": 0.23552
}

Semantic roles & 50–950 ramp

primary

#428AC9

secondary

#D1B196

accent

#8F49DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428AC9

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

Preview Lab → · Contrast checker → · Palette generator →