#428FE0#428FE0

#428FE0 is a light, vivid cyan. Relative luminance 0.262; OKLCH L 64.0% C 0.144 H 252.0°. Best body text is #000000 at 6.24:1 contrast (WCAG AA passes).

Color values

HEX#428FE0
RGBrgb(66, 143, 224)
HSLhsl(211, 72%, 57%)
HSVhsv(211, 71%, 88%)
CMYKcmyk(70.5%, 36.2%, 0%, 12.2%)
CIE-LABlab(58.21, 2.69, -48.06)
CIE-LCHlch(58.21, 48.14, 273.20°)
OKLaboklab(63.97% -0.0443 -0.1367)
OKLCHoklch(63.97% 0.144 252)
XYZxyz(25.5188, 26.1822, 74.2153)
Luminance0.2619 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428FE0 #E09342
analogous
#42DEE0 #428FE0 #4442E0
triadic
#428FE0 #E0428F #8FE042
tetradic
#428FE0 #E042DE #E09342 #42E044
square
#428FE0 #E042DE #E09342 #42E044
split-complementary
#428FE0 #E04442 #DEE042
monochromatic
#185290 #2070C5 #428FE0 #77AEE9 #ABCDF1

Accessibility & contrast

On white

3.37
#428FE0 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.24
#428FE0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FE0
6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428FE0#FFFFFF#000000##000000
##428FE01.003.376.246.24
#FFFFFF3.371.0021.0021.00
#0000006.2421.001.001.00
##0000006.2421.001.001.00

Color blindness preview

Protanopia (red-blind)
#6A94E3
Deuteranopia (green-blind)
#5385DE
Tritanopia (blue-blind)
#00A2AD
Achromatopsia (no color)
#8C8C8C

Design tokens & code

CSS
--color: #428fe0;
/* rgb */ color: rgb(66, 143, 224);
/* oklch */ color: oklch(64.0% 0.144 252.0);
Tailwind
colors: {
  custom: {
    50: '#88afea',
    500: '#428fe0',
    950: '#000000',
  },
}
SCSS
$custom: #428fe0;
$custom-light: #88afea;
$custom-dark: #000000;
JSON
{
  "hex": "#428fe0",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 224
  },
  "hsl": {
    "h": 210.759,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.63969,
    "c": 0.14371,
    "h": 252
  },
  "luminance": 0.26185
}

Semantic roles & 50–950 ramp

primary
#428FE0
secondary
#DFC09F
accent
#9639EF
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #428FE0

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

Preview Lab → · Contrast checker → · Palette generator →

#428FE0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva