#428EE9#428EE9

#428EE9 is a light, vivid cyan. Relative luminance 0.264; OKLCH L 64.3% C 0.156 H 254.7°. Best body text is #000000 at 6.28:1 contrast (WCAG AA passes).

Color values

HEX#428EE9
RGBrgb(66, 142, 233)
HSLhsl(213, 79%, 59%)
HSVhsv(213, 72%, 91%)
CMYKcmyk(71.7%, 39.1%, 0%, 8.6%)
CIE-LABlab(58.40, 6.45, -52.77)
CIE-LCHlch(58.40, 53.16, 276.97°)
OKLaboklab(64.27% -0.0413 -0.1505)
OKLCHoklch(64.27% 0.156 254.7)
XYZxyz(26.6223, 26.3845, 80.7647)
Luminance0.2639 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428EE9 #E99D42
analogous
#42E1E9 #428EE9 #4942E9
triadic
#428EE9 #E9428E #8EE942
tetradic
#428EE9 #E942E1 #E99D42 #42E949
square
#428EE9 #E942E1 #E99D42 #42E949
split-complementary
#428EE9 #E94942 #E1E942
monochromatic
#12529E #196ED5 #428EE9 #79AFEF #B0D0F6

Accessibility & contrast

On white

3.35
#428EE9 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.28
#428EE9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EE9
6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428EE9#FFFFFF#000000##000000
##428EE91.003.356.286.28
#FFFFFF3.351.0021.0021.00
#0000006.2821.001.001.00
##0000006.2821.001.001.00

Color blindness preview

Protanopia (red-blind)
#6395ED
Deuteranopia (green-blind)
#4985E7
Tritanopia (blue-blind)
#00A3B0
Achromatopsia (no color)
#8C8C8C

Design tokens & code

CSS
--color: #428ee9;
/* rgb */ color: rgb(66, 142, 233);
/* oklch */ color: oklch(64.3% 0.156 254.7);
Tailwind
colors: {
  custom: {
    50: '#8aaef0',
    500: '#428ee9',
    950: '#000000',
  },
}
SCSS
$custom: #428ee9;
$custom-light: #8aaef0;
$custom-dark: #000000;
JSON
{
  "hex": "#428ee9",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 233
  },
  "hsl": {
    "h": 212.695,
    "s": 79.147,
    "l": 58.627
  },
  "oklch": {
    "l": 0.64272,
    "c": 0.15606,
    "h": 254.7
  },
  "luminance": 0.26387
}

Semantic roles & 50–950 ramp

primary
#428EE9
secondary
#E4C6A2
accent
#9D32F6
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1017
muted
#7E7F85

Preview Lab

Preview with #428EE9

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

Preview Lab → · Contrast checker → · Palette generator →

#428EE9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva