#428CE4#428CE4

#428CE4 is a light, vivid cyan. Relative luminance 0.255; OKLCH L 63.5% C 0.152 H 254.5°. Best body text is #000000 at 6.10:1 contrast (WCAG AA passes).

Color values

HEX#428CE4
RGBrgb(66, 140, 228)
HSLhsl(213, 75%, 58%)
HSVhsv(213, 71%, 89%)
CMYKcmyk(71.1%, 38.6%, 0%, 10.6%)
CIE-LABlab(57.57, 5.88, -51.31)
CIE-LCHlch(57.57, 51.64, 276.54°)
OKLaboklab(63.54% -0.0406 -0.1462)
OKLCHoklch(63.54% 0.152 254.5)
XYZxyz(25.6233, 25.5131, 76.9579)
Luminance0.2552 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428CE4 #E49A42
analogous
#42DDE4 #428CE4 #4942E4
triadic
#428CE4 #E4428C #8CE442
tetradic
#428CE4 #E442DD #E49A42 #42E449
square
#428CE4 #E442DD #E49A42 #42E449
split-complementary
#428CE4 #E44942 #DDE442
monochromatic
#155096 #1D6DCC #428CE4 #78ADEC #ADCDF3

Accessibility & contrast

On white

3.44
#428CE4 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.10
#428CE4 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE4
6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428CE4#FFFFFF#000000##000000
##428CE41.003.446.106.10
#FFFFFF3.441.0021.0021.00
#0000006.1021.001.001.00
##0000006.1021.001.001.00

Color blindness preview

Protanopia (red-blind)
#6392E8
Deuteranopia (green-blind)
#4A83E2
Tritanopia (blue-blind)
#00A1AD
Achromatopsia (no color)
#8A8A8A

Design tokens & code

CSS
--color: #428ce4;
/* rgb */ color: rgb(66, 140, 228);
/* oklch */ color: oklch(63.5% 0.152 254.5);
Tailwind
colors: {
  custom: {
    50: '#89aded',
    500: '#428ce4',
    950: '#000000',
  },
}
SCSS
$custom: #428ce4;
$custom-light: #89aded;
$custom-dark: #000000;
JSON
{
  "hex": "#428ce4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 228
  },
  "hsl": {
    "h": 212.593,
    "s": 75,
    "l": 57.647
  },
  "oklch": {
    "l": 0.63539,
    "c": 0.15177,
    "h": 254.5
  },
  "luminance": 0.25516
}

Semantic roles & 50–950 ramp

primary
#428CE4
secondary
#E2C4A0
accent
#9C36F2
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #428CE4

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

Preview Lab → · Contrast checker → · Palette generator →

#428CE4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva