#428FE1#428FE1

#428FE1 is a light, vivid cyan. Relative luminance 0.262; OKLCH L 64.0% C 0.145 H 252.3°. Best body text is #000000 at 6.25:1 contrast (WCAG AA passes).

Color values

HEX#428FE1
RGBrgb(66, 143, 225)
HSLhsl(211, 73%, 57%)
HSVhsv(211, 71%, 88%)
CMYKcmyk(70.7%, 36.4%, 0%, 11.8%)
CIE-LABlab(58.26, 3.04, -48.54)
CIE-LCHlch(58.26, 48.64, 273.59°)
OKLaboklab(64.03% -0.0441 -0.1381)
OKLCHoklch(64.03% 0.145 252.3)
XYZxyz(25.6548, 26.2366, 74.9317)
Luminance0.2624 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428FE1 #E19442
analogous
#42DFE1 #428FE1 #4442E1
triadic
#428FE1 #E1428F #8FE142
tetradic
#428FE1 #E142DF #E19442 #42E144
square
#428FE1 #E142DF #E19442 #42E144
split-complementary
#428FE1 #E14442 #DFE142
monochromatic
#175292 #1F70C6 #428FE1 #77AEE9 #ACCEF2

Accessibility & contrast

On white

3.36
#428FE1 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.25
#428FE1 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FE1
6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428FE1#FFFFFF#000000##000000
##428FE11.003.366.256.25
#FFFFFF3.361.0021.0021.00
#0000006.2521.001.001.00
##0000006.2521.001.001.00

Color blindness preview

Protanopia (red-blind)
#6A94E4
Deuteranopia (green-blind)
#5285DF
Tritanopia (blue-blind)
#00A2AD
Achromatopsia (no color)
#8C8C8C

Design tokens & code

CSS
--color: #428fe1;
/* rgb */ color: rgb(66, 143, 225);
/* oklch */ color: oklch(64.0% 0.145 252.3);
Tailwind
colors: {
  custom: {
    50: '#89afeb',
    500: '#428fe1',
    950: '#000000',
  },
}
SCSS
$custom: #428fe1;
$custom-light: #89afeb;
$custom-dark: #000000;
JSON
{
  "hex": "#428fe1",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 225
  },
  "hsl": {
    "h": 210.943,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.64026,
    "c": 0.14496,
    "h": 252.3
  },
  "luminance": 0.26239
}

Semantic roles & 50–950 ramp

primary
#428FE1
secondary
#E0C09F
accent
#9738EF
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1016
muted
#7E7F84

Preview Lab

Preview with #428FE1

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

Preview Lab → · Contrast checker → · Palette generator →

#428FE1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva