#428DE9#428DE9

#428DE9 is a light, vivid cyan. Relative luminance 0.261; OKLCH L 64.1% C 0.157 H 255.1°. Best body text is #000000 at 6.22:1 contrast (WCAG AA passes).

Color values

HEX#428DE9
RGBrgb(66, 141, 233)
HSLhsl(213, 79%, 59%)
HSVhsv(213, 72%, 91%)
CMYKcmyk(71.7%, 39.5%, 0%, 8.6%)
CIE-LABlab(58.12, 7.05, -53.21)
CIE-LCHlch(58.12, 53.68, 277.55°)
OKLaboklab(64.05% -0.0404 -0.1518)
OKLCHoklch(64.05% 0.157 255.1)
XYZxyz(26.4742, 26.0883, 80.7153)
Luminance0.2609 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428DE9 #E99E42
analogous
#42E0E9 #428DE9 #4A42E9
triadic
#428DE9 #E9428D #8DE942
tetradic
#428DE9 #E942E0 #E99E42 #42E94A
square
#428DE9 #E942E0 #E99E42 #42E94A
split-complementary
#428DE9 #E94A42 #E0E942
monochromatic
#12519E #196DD5 #428DE9 #79AEEF #B0CFF6

Accessibility & contrast

On white

3.38
#428DE9 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.22
#428DE9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DE9
6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428DE9#FFFFFF#000000##000000
##428DE91.003.386.226.22
#FFFFFF3.381.0021.0021.00
#0000006.2221.001.001.00
##0000006.2221.001.001.00

Color blindness preview

Protanopia (red-blind)
#6294ED
Deuteranopia (green-blind)
#4785E7
Tritanopia (blue-blind)
#00A3B0
Achromatopsia (no color)
#8C8C8C

Design tokens & code

CSS
--color: #428de9;
/* rgb */ color: rgb(66, 141, 233);
/* oklch */ color: oklch(64.1% 0.157 255.1);
Tailwind
colors: {
  custom: {
    50: '#8aadf0',
    500: '#428de9',
    950: '#000000',
  },
}
SCSS
$custom: #428de9;
$custom-light: #8aadf0;
$custom-dark: #000000;
JSON
{
  "hex": "#428de9",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 233
  },
  "hsl": {
    "h": 213.054,
    "s": 79.147,
    "l": 58.627
  },
  "oklch": {
    "l": 0.64054,
    "c": 0.1571,
    "h": 255.1
  },
  "luminance": 0.26091
}

Semantic roles & 50–950 ramp

primary
#428DE9
secondary
#E4C7A2
accent
#9E32F6
background
#F9FAFE
surface
#F1F4FD
border
#CBCED5
text
#0D1017
muted
#7E7F85

Preview Lab

Preview with #428DE9

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

Preview Lab → · Contrast checker → · Palette generator →

#428DE9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva