#428CE8#428CE8

#428CE8 is a light, vivid cyan. Relative luminance 0.257; OKLCH L 63.8% C 0.157 H 255.3°. Best body text is #000000 at 6.15:1 contrast (WCAG AA passes).

Color values

HEX#428CE8
RGBrgb(66, 140, 232)
HSLhsl(213, 78%, 58%)
HSVhsv(213, 72%, 91%)
CMYKcmyk(71.6%, 39.7%, 0%, 9%)
CIE-LABlab(57.79, 7.29, -53.19)
CIE-LCHlch(57.79, 53.69, 277.81°)
OKLaboklab(63.78% -0.0397 -0.1518)
OKLCHoklch(63.78% 0.157 255.3)
XYZxyz(26.1850, 25.7377, 79.9162)
Luminance0.2574 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428CE8 #E89E42
analogous
#42DFE8 #428CE8 #4B42E8
triadic
#428CE8 #E8428C #8CE842
tetradic
#428CE8 #E842DF #E89E42 #42E84B
square
#428CE8 #E842DF #E89E42 #42E84B
split-complementary
#428CE8 #E84B42 #DFE842
monochromatic
#13509D #1A6CD3 #428CE8 #79ADEF #AFCEF5

Accessibility & contrast

On white

3.42
#428CE8 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.15
#428CE8 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE8
6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428CE8#FFFFFF#000000##000000
##428CE81.003.426.156.15
#FFFFFF3.421.0021.0021.00
#0000006.1521.001.001.00
##0000006.1521.001.001.00

Color blindness preview

Protanopia (red-blind)
#6193EC
Deuteranopia (green-blind)
#4684E6
Tritanopia (blue-blind)
#00A2AF
Achromatopsia (no color)
#8B8B8B

Design tokens & code

CSS
--color: #428ce8;
/* rgb */ color: rgb(66, 140, 232);
/* oklch */ color: oklch(63.8% 0.157 255.3);
Tailwind
colors: {
  custom: {
    50: '#8aadf0',
    500: '#428ce8',
    950: '#000000',
  },
}
SCSS
$custom: #428ce8;
$custom-light: #8aadf0;
$custom-dark: #000000;
JSON
{
  "hex": "#428ce8",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 232
  },
  "hsl": {
    "h": 213.253,
    "s": 78.302,
    "l": 58.431
  },
  "oklch": {
    "l": 0.63777,
    "c": 0.15687,
    "h": 255.3
  },
  "luminance": 0.25741
}

Semantic roles & 50–950 ramp

primary
#428CE8
secondary
#E4C6A2
accent
#9E33F5
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #428CE8

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

Preview Lab → · Contrast checker → · Palette generator →

#428CE8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva