#428EE1#428EE1

#428EE1 is a light, vivid cyan. Relative luminance 0.259; OKLCH L 63.8% C 0.146 H 252.8°. Best body text is #000000 at 6.19:1 contrast (WCAG AA passes).

Color values

HEX#428EE1
RGBrgb(66, 142, 225)
HSLhsl(211, 73%, 57%)
HSVhsv(211, 71%, 88%)
CMYKcmyk(70.7%, 36.9%, 0%, 11.8%)
CIE-LABlab(57.98, 3.63, -48.99)
CIE-LCHlch(57.98, 49.12, 274.24°)
OKLaboklab(63.81% -0.0432 -0.1394)
OKLCHoklch(63.81% 0.146 252.8)
XYZxyz(25.5053, 25.9377, 74.8819)
Luminance0.2594 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428EE1 #E19542
analogous
#42DDE1 #428EE1 #4642E1
triadic
#428EE1 #E1428E #8EE142
tetradic
#428EE1 #E142DD #E19542 #42E146
square
#428EE1 #E142DD #E19542 #42E146
split-complementary
#428EE1 #E14642 #DDE142
monochromatic
#175292 #1F6FC6 #428EE1 #77AEE9 #ACCDF2

Accessibility & contrast

On white

3.39
#428EE1 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.19
#428EE1 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EE1
6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428EE1#FFFFFF#000000##000000
##428EE11.003.396.196.19
#FFFFFF3.391.0021.0021.00
#0000006.1921.001.001.00
##0000006.1921.001.001.00

Color blindness preview

Protanopia (red-blind)
#6893E4
Deuteranopia (green-blind)
#5085DF
Tritanopia (blue-blind)
#00A1AD
Achromatopsia (no color)
#8B8B8B

Design tokens & code

CSS
--color: #428ee1;
/* rgb */ color: rgb(66, 142, 225);
/* oklch */ color: oklch(63.8% 0.146 252.8);
Tailwind
colors: {
  custom: {
    50: '#89aeeb',
    500: '#428ee1',
    950: '#000000',
  },
}
SCSS
$custom: #428ee1;
$custom-light: #89aeeb;
$custom-dark: #000000;
JSON
{
  "hex": "#428ee1",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 225
  },
  "hsl": {
    "h": 211.321,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.63805,
    "c": 0.14595,
    "h": 252.8
  },
  "luminance": 0.2594
}

Semantic roles & 50–950 ramp

primary
#428EE1
secondary
#E0C19F
accent
#9838EF
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #428EE1

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

Preview Lab → · Contrast checker → · Palette generator →

#428EE1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva