#428ED1#428ED1

#428ED1 is a light, vivid cyan. Relative luminance 0.251; OKLCH L 62.9% C 0.126 H 247.9°. Best body text is #000000 at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#428ED1
RGB	rgb(66, 142, 209)
HSL	hsl(208, 61%, 54%)
HSV	hsv(208, 68%, 82%)
CMYK	cmyk(68.4%, 32.1%, 0%, 18%)
CIE-LAB	lab(57.18, -1.94, -41.30)
CIE-LCH	lch(57.18, 41.34, 267.31°)
OKLab	oklab(62.92% -0.0474 -0.1169)
OKLCH	oklch(62.92% 0.126 247.9)
XYZ	xyz(23.4241, 25.1052, 63.9205)
Luminance	0.2511 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ED1 #D18542

analogous

#42D1CD #428ED1 #4247D1

triadic

#428ED1 #D1428E #8ED142

tetradic

#428ED1 #CD42D1 #D18542 #47D142

square

#428ED1 #CD42D1 #D18542 #47D142

split-complementary

#428ED1 #D14247 #D1CD42

monochromatic

#1E4F7B #2A6FAC #428ED1 #73ABDD #A4C9E9

Accessibility & contrast

On white

3.49

#428ED1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.02

#428ED1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ED1

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ED1	#FFFFFF	#000000	##000000
##428ED1	1.00	3.49	6.02	6.02
#FFFFFF	3.49	1.00	21.00	21.00
#000000	6.02	21.00	1.00	1.00
##000000	6.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7091D4

Deuteranopia (green-blind)

#5C83D0

Tritanopia (blue-blind)

#009EA6

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428ed1;
/* rgb */ color: rgb(66, 142, 209);
/* oklch */ color: oklch(62.9% 0.126 247.9);

Tailwind

colors: {
  custom: {
    50: '#86aedf',
    500: '#428ed1',
    950: '#000000',
  },
}

SCSS

$custom: #428ed1;
$custom-light: #86aedf;
$custom-dark: #000000;

JSON

{
  "hex": "#428ed1",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 209
  },
  "hsl": {
    "h": 208.112,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.62916,
    "c": 0.12619,
    "h": 247.9
  },
  "luminance": 0.25108
}

Semantic roles & 50–950 ramp

primary

#428ED1

secondary

#D6B599

accent

#8F44E4

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ED1

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

Preview Lab → · Contrast checker → · Palette generator →