#428CD2#428CD2

#428CD2 is a light, vivid cyan. Relative luminance 0.246; OKLCH L 62.5% C 0.129 H 249.5°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#428CD2
RGB	rgb(66, 140, 210)
HSL	hsl(209, 62%, 54%)
HSV	hsv(209, 69%, 82%)
CMYK	cmyk(68.6%, 33.3%, 0%, 17.6%)
CIE-LAB	lab(56.65, -0.43, -42.69)
CIE-LCH	lch(56.65, 42.69, 269.43°)
OKLab	oklab(62.52% -0.0452 -0.121)
OKLCH	oklch(62.52% 0.129 249.5)
XYZ	xyz(23.2534, 24.5651, 64.4763)
Luminance	0.2457 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CD2 #D28842

analogous

#42D2D0 #428CD2 #4244D2

triadic

#428CD2 #D2428C #8CD242

tetradic

#428CD2 #D042D2 #D28842 #44D242

square

#428CD2 #D042D2 #D28842 #44D242

split-complementary

#428CD2 #D24244 #D2D042

monochromatic

#1E4E7C #296DAD #428CD2 #73AADE #A5C8EA

Accessibility & contrast

On white

3.55

#428CD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#428CD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CD2

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CD2	#FFFFFF	#000000	##000000
##428CD2	1.00	3.55	5.91	5.91
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.91	21.00	1.00	1.00
##000000	5.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D8FD5

Deuteranopia (green-blind)

#5982D1

Tritanopia (blue-blind)

#009DA5

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428cd2;
/* rgb */ color: rgb(66, 140, 210);
/* oklch */ color: oklch(62.5% 0.129 249.5);

Tailwind

colors: {
  custom: {
    50: '#86ade0',
    500: '#428cd2',
    950: '#000000',
  },
}

SCSS

$custom: #428cd2;
$custom-light: #86ade0;
$custom-dark: #000000;

JSON

{
  "hex": "#428cd2",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 210
  },
  "hsl": {
    "h": 209.167,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.62516,
    "c": 0.12919,
    "h": 249.5
  },
  "luminance": 0.24568
}

Semantic roles & 50–950 ramp

primary

#428CD2

secondary

#D7B799

accent

#9243E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CD2

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

Preview Lab → · Contrast checker → · Palette generator →