#428ACE#428ACE

#428ACE is a mid, vivid cyan. Relative luminance 0.238; OKLCH L 61.8% C 0.126 H 249.4°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#428ACE
RGB	rgb(66, 138, 206)
HSL	hsl(209, 59%, 53%)
HSV	hsv(209, 68%, 81%)
CMYK	cmyk(68%, 33%, 0%, 19.2%)
CIE-LAB	lab(55.88, -0.64, -41.66)
CIE-LCH	lch(55.88, 41.66, 269.12°)
OKLab	oklab(61.84% -0.0443 -0.118)
OKLCH	oklch(61.84% 0.126 249.4)
XYZ	xyz(22.4717, 23.7891, 61.7880)
Luminance	0.2379 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ACE #CE8642

analogous

#42CECC #428ACE #4244CE

triadic

#428ACE #CE428A #8ACE42

tetradic

#428ACE #CC42CE #CE8642 #44CE42

square

#428ACE #CC42CE #CE8642 #44CE42

split-complementary

#428ACE #CE4244 #CECC42

monochromatic

#1F4C77 #2B6BA7 #428ACE #73A8DB #A3C6E7

Accessibility & contrast

On white

3.65

#428ACE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#428ACE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ACE

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ACE	#FFFFFF	#000000	##000000
##428ACE	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C8DD1

Deuteranopia (green-blind)

#5880CD

Tritanopia (blue-blind)

#009AA2

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428ace;
/* rgb */ color: rgb(66, 138, 206);
/* oklch */ color: oklch(61.8% 0.126 249.4);

Tailwind

colors: {
  custom: {
    50: '#85abdd',
    500: '#428ace',
    950: '#000000',
  },
}

SCSS

$custom: #428ace;
$custom-light: #85abdd;
$custom-dark: #000000;

JSON

{
  "hex": "#428ace",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 206
  },
  "hsl": {
    "h": 209.143,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.61844,
    "c": 0.12609,
    "h": 249.4
  },
  "luminance": 0.23791
}

Semantic roles & 50–950 ramp

primary

#428ACE

secondary

#D4B598

accent

#9246E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ACE

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

Preview Lab → · Contrast checker → · Palette generator →