#428AD0#428AD0

#428AD0 is a mid, vivid cyan. Relative luminance 0.239; OKLCH L 62.0% C 0.129 H 250.1°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#428AD0
RGB	rgb(66, 138, 208)
HSL	hsl(210, 60%, 54%)
HSV	hsv(210, 68%, 82%)
CMYK	cmyk(68.3%, 33.7%, 0%, 18.4%)
CIE-LAB	lab(55.97, 0.06, -42.63)
CIE-LCH	lch(55.97, 42.63, 270.08°)
OKLab	oklab(61.95% -0.0437 -0.1209)
OKLCH	oklch(61.95% 0.129 250.1)
XYZ	xyz(22.7162, 23.8869, 63.0757)
Luminance	0.2389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AD0 #D08842

analogous

#42D0CF #428AD0 #4243D0

triadic

#428AD0 #D0428A #8AD042

tetradic

#428AD0 #CF42D0 #D08842 #43D042

square

#428AD0 #CF42D0 #D08842 #43D042

split-complementary

#428AD0 #D04243 #D0CF42

monochromatic

#1E4C79 #2A6BAA #428AD0 #73A8DC #A4C7E8

Accessibility & contrast

On white

3.63

#428AD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#428AD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AD0

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AD0	#FFFFFF	#000000	##000000
##428AD0	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B8ED3

Deuteranopia (green-blind)

#5780CF

Tritanopia (blue-blind)

#009AA3

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428ad0;
/* rgb */ color: rgb(66, 138, 208);
/* oklch */ color: oklch(62.0% 0.129 250.1);

Tailwind

colors: {
  custom: {
    50: '#86abde',
    500: '#428ad0',
    950: '#000000',
  },
}

SCSS

$custom: #428ad0;
$custom-light: #86abde;
$custom-dark: #000000;

JSON

{
  "hex": "#428ad0",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 208
  },
  "hsl": {
    "h": 209.577,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.61954,
    "c": 0.12855,
    "h": 250.1
  },
  "luminance": 0.23889
}

Semantic roles & 50–950 ramp

primary

#428AD0

secondary

#D5B699

accent

#9344E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428AD0

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

Preview Lab → · Contrast checker → · Palette generator →