#428BD0#428BD0

#428BD0 is a light, vivid cyan. Relative luminance 0.242; OKLCH L 62.2% C 0.128 H 249.5°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#428BD0
RGB	rgb(66, 139, 208)
HSL	hsl(209, 60%, 54%)
HSV	hsv(209, 68%, 82%)
CMYK	cmyk(68.3%, 33.2%, 0%, 18.4%)
CIE-LAB	lab(56.26, -0.53, -42.18)
CIE-LCH	lch(56.26, 42.18, 269.28°)
OKLab	oklab(62.18% -0.0447 -0.1195)
OKLCH	oklch(62.18% 0.128 249.5)
XYZ	xyz(22.8603, 24.1751, 63.1238)
Luminance	0.2418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BD0 #D08742

analogous

#42D0CE #428BD0 #4244D0

triadic

#428BD0 #D0428B #8BD042

tetradic

#428BD0 #CE42D0 #D08742 #44D042

square

#428BD0 #CE42D0 #D08742 #44D042

split-complementary

#428BD0 #D04244 #D0CE42

monochromatic

#1E4D79 #2A6CAA #428BD0 #73A9DC #A4C7E8

Accessibility & contrast

On white

3.60

#428BD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#428BD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BD0

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BD0	#FFFFFF	#000000	##000000
##428BD0	1.00	3.60	5.84	5.84
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C8ED3

Deuteranopia (green-blind)

#5881CF

Tritanopia (blue-blind)

#009BA4

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428bd0;
/* rgb */ color: rgb(66, 139, 208);
/* oklch */ color: oklch(62.2% 0.128 249.5);

Tailwind

colors: {
  custom: {
    50: '#86acde',
    500: '#428bd0',
    950: '#000000',
  },
}

SCSS

$custom: #428bd0;
$custom-light: #86acde;
$custom-dark: #000000;

JSON

{
  "hex": "#428bd0",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 208
  },
  "hsl": {
    "h": 209.155,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.6218,
    "c": 0.12763,
    "h": 249.5
  },
  "luminance": 0.24178
}

Semantic roles & 50–950 ramp

primary

#428BD0

secondary

#D5B699

accent

#9244E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428BD0

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

Preview Lab → · Contrast checker → · Palette generator →