#428CD3#428CD3

#428CD3 is a light, vivid cyan. Relative luminance 0.246; OKLCH L 62.6% C 0.130 H 249.9°. Best body text is #000000 at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#428CD3
RGB	rgb(66, 140, 211)
HSL	hsl(209, 62%, 54%)
HSV	hsv(209, 69%, 83%)
CMYK	cmyk(68.7%, 33.6%, 0%, 17.3%)
CIE-LAB	lab(56.70, -0.08, -43.18)
CIE-LCH	lch(56.70, 43.18, 269.90°)
OKLab	oklab(62.57% -0.0449 -0.1224)
OKLCH	oklch(62.57% 0.13 249.9)
XYZ	xyz(23.3783, 24.6151, 65.1345)
Luminance	0.2462 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CD3 #D38942

analogous

#42D3D1 #428CD3 #4244D3

triadic

#428CD3 #D3428C #8CD342

tetradic

#428CD3 #D142D3 #D38942 #44D342

square

#428CD3 #D142D3 #D38942 #44D342

split-complementary

#428CD3 #D34244 #D3D142

monochromatic

#1D4E7D #296DAF #428CD3 #74AADF #A5C8EA

Accessibility & contrast

On white

3.55

#428CD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.92

#428CD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CD3

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CD3	#FFFFFF	#000000	##000000
##428CD3	1.00	3.55	5.92	5.92
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.92	21.00	1.00	1.00
##000000	5.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C90D6

Deuteranopia (green-blind)

#5882D2

Tritanopia (blue-blind)

#009DA6

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428cd3;
/* rgb */ color: rgb(66, 140, 211);
/* oklch */ color: oklch(62.6% 0.130 249.9);

Tailwind

colors: {
  custom: {
    50: '#86ade1',
    500: '#428cd3',
    950: '#000000',
  },
}

SCSS

$custom: #428cd3;
$custom-light: #86ade1;
$custom-dark: #000000;

JSON

{
  "hex": "#428cd3",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 211
  },
  "hsl": {
    "h": 209.379,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.62571,
    "c": 0.13042,
    "h": 249.9
  },
  "luminance": 0.24618
}

Semantic roles & 50–950 ramp

primary

#428CD3

secondary

#D7B89A

accent

#9242E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CD3

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

Preview Lab → · Contrast checker → · Palette generator →