#428AD3#428AD3

#428AD3 is a light, vivid cyan. Relative luminance 0.240; OKLCH L 62.1% C 0.132 H 251.1°. Best body text is #000000 at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#428AD3
RGB	rgb(66, 138, 211)
HSL	hsl(210, 62%, 54%)
HSV	hsv(210, 69%, 83%)
CMYK	cmyk(68.7%, 34.6%, 0%, 17.3%)
CIE-LAB	lab(56.12, 1.10, -44.08)
CIE-LCH	lch(56.12, 44.10, 271.43°)
OKLab	oklab(62.12% -0.0429 -0.1251)
OKLCH	oklch(62.12% 0.132 251.1)
XYZ	xyz(23.0887, 24.0359, 65.0380)
Luminance	0.2404 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AD3 #D38B42

analogous

#42D3D3 #428AD3 #4342D3

triadic

#428AD3 #D3428A #8AD342

tetradic

#428AD3 #D342D3 #D38B42 #42D343

square

#428AD3 #D342D3 #D38B42 #42D343

split-complementary

#428AD3 #D34342 #D3D342

monochromatic

#1D4D7D #296BAF #428AD3 #74A9DF #A5C7EA

Accessibility & contrast

On white

3.62

#428AD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.81

#428AD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AD3

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AD3	#FFFFFF	#000000	##000000
##428AD3	1.00	3.62	5.81	5.81
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.81	21.00	1.00	1.00
##000000	5.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698ED6

Deuteranopia (green-blind)

#5580D2

Tritanopia (blue-blind)

#009BA5

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ad3;
/* rgb */ color: rgb(66, 138, 211);
/* oklch */ color: oklch(62.1% 0.132 251.1);

Tailwind

colors: {
  custom: {
    50: '#86abe1',
    500: '#428ad3',
    950: '#000000',
  },
}

SCSS

$custom: #428ad3;
$custom-light: #86abe1;
$custom-dark: #000000;

JSON

{
  "hex": "#428ad3",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 211
  },
  "hsl": {
    "h": 210.207,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.6212,
    "c": 0.13229,
    "h": 251.1
  },
  "luminance": 0.24038
}

Semantic roles & 50–950 ramp

primary

#428AD3

secondary

#D7B99A

accent

#9442E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428AD3

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

Preview Lab → · Contrast checker → · Palette generator →