#428ED5#428ED5

#428ED5 is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.1% C 0.131 H 249.3°. Best body text is #000000 at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#428ED5
RGB	rgb(66, 142, 213)
HSL	hsl(209, 64%, 55%)
HSV	hsv(209, 69%, 84%)
CMYK	cmyk(69%, 33.3%, 0%, 16.5%)
CIE-LAB	lab(57.37, -0.56, -43.24)
CIE-LCH	lch(57.37, 43.24, 269.26°)
OKLab	oklab(63.13% -0.0463 -0.1226)
OKLCH	oklch(63.13% 0.131 249.3)
XYZ	xyz(23.9255, 25.3058, 66.5615)
Luminance	0.2531 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ED5 #D58942

analogous

#42D5D3 #428ED5 #4244D5

triadic

#428ED5 #D5428E #8ED542

tetradic

#428ED5 #D342D5 #D58942 #44D542

square

#428ED5 #D342D5 #D58942 #44D542

split-complementary

#428ED5 #D54244 #D5D342

monochromatic

#1C5080 #286FB2 #428ED5 #74ACE0 #A6CAEB

Accessibility & contrast

On white

3.46

#428ED5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.06

#428ED5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ED5

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ED5	#FFFFFF	#000000	##000000
##428ED5	1.00	3.46	6.06	6.06
#FFFFFF	3.46	1.00	21.00	21.00
#000000	6.06	21.00	1.00	1.00
##000000	6.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E91D8

Deuteranopia (green-blind)

#5A83D4

Tritanopia (blue-blind)

#009FA8

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ed5;
/* rgb */ color: rgb(66, 142, 213);
/* oklch */ color: oklch(63.1% 0.131 249.3);

Tailwind

colors: {
  custom: {
    50: '#86aee2',
    500: '#428ed5',
    950: '#000000',
  },
}

SCSS

$custom: #428ed5;
$custom-light: #86aee2;
$custom-dark: #000000;

JSON

{
  "hex": "#428ed5",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 213
  },
  "hsl": {
    "h": 208.98,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.63132,
    "c": 0.13104,
    "h": 249.3
  },
  "luminance": 0.25308
}

Semantic roles & 50–950 ramp

primary

#428ED5

secondary

#D8B89A

accent

#9141E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ED5

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

Preview Lab → · Contrast checker → · Palette generator →