#428FEB#428FEB

#428FEB is a light, vivid cyan. Relative luminance 0.268; OKLCH L 64.6% C 0.158 H 254.6°. Best body text is #000000 at 6.36:1 contrast (WCAG AA passes).

Color values

HEX#428FEB
RGBrgb(66, 143, 235)
HSLhsl(213, 81%, 59%)
HSVhsv(213, 72%, 92%)
CMYKcmyk(71.9%, 39.1%, 0%, 7.8%)
CIE-LABlab(58.79, 6.57, -53.26)
CIE-LCHlch(58.79, 53.66, 277.03°)
OKLaboklab(64.61% -0.0417 -0.1519)
OKLCHoklch(64.61% 0.158 254.6)
XYZxyz(27.0591, 26.7983, 82.3277)
Luminance0.2680 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428FEB #EB9E42
analogous
#42E3EB #428FEB #4A42EB
triadic
#428FEB #EB428F #8FEB42
tetradic
#428FEB #EB42E3 #EB9E42 #42EB4A
square
#428FEB #EB42E3 #EB9E42 #42EB4A
split-complementary
#428FEB #EB4A42 #E3EB42
monochromatic
#1153A2 #176FD9 #428FEB #79B0F1 #B1D1F7

Accessibility & contrast

On white

3.30
#428FEB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.36
#428FEB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FEB
6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428FEB#FFFFFF#000000##000000
##428FEB1.003.306.366.36
#FFFFFF3.301.0021.0021.00
#0000006.3621.001.001.00
##0000006.3621.001.001.00

Color blindness preview

Protanopia (red-blind)
#6496EF
Deuteranopia (green-blind)
#4986E9
Tritanopia (blue-blind)
#00A5B2
Achromatopsia (no color)
#8D8D8D

Design tokens & code

CSS
--color: #428feb;
/* rgb */ color: rgb(66, 143, 235);
/* oklch */ color: oklch(64.6% 0.158 254.6);
Tailwind
colors: {
  custom: {
    50: '#8aaff2',
    500: '#428feb',
    950: '#000000',
  },
}
SCSS
$custom: #428feb;
$custom-light: #8aaff2;
$custom-dark: #000000;
JSON
{
  "hex": "#428feb",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 235
  },
  "hsl": {
    "h": 212.663,
    "s": 80.861,
    "l": 59.02
  },
  "oklch": {
    "l": 0.64608,
    "c": 0.15755,
    "h": 254.6
  },
  "luminance": 0.26801
}

Semantic roles & 50–950 ramp

primary
#428FEB
secondary
#E6C7A3
accent
#9D31F7
background
#F9FAFE
surface
#F2F4FD
border
#CCCED5
text
#0D1017
muted
#7E7F85

Preview Lab

Preview with #428FEB

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

Preview Lab → · Contrast checker → · Palette generator →

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