#428ACF#428ACF

#428ACF is a mid, vivid cyan. Relative luminance 0.238; OKLCH L 61.9% C 0.127 H 249.8°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX#428ACF
RGBrgb(66, 138, 207)
HSLhsl(209, 59%, 54%)
HSVhsv(209, 68%, 81%)
CMYKcmyk(68.1%, 33.3%, 0%, 18.8%)
CIE-LABlab(55.92, -0.29, -42.14)
CIE-LCHlch(55.92, 42.15, 269.61°)
OKLaboklab(61.9% -0.044 -0.1195)
OKLCHoklch(61.9% 0.127 249.8)
XYZxyz(22.5935, 23.8378, 62.4298)
Luminance0.2384 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#428ACF #CF8742
analogous
#42CFCE #428ACF #4243CF
triadic
#428ACF #CF428A #8ACF42
tetradic
#428ACF #CE42CF #CF8742 #43CF42
square
#428ACF #CE42CF #CF8742 #43CF42
split-complementary
#428ACF #CF4243 #CFCE42
monochromatic
#1F4C78 #2B6BA9 #428ACF #73A8DB #A4C6E8

Accessibility & contrast

On white

3.64
#428ACF on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.77
#428ACF on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ACF
5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##428ACF#FFFFFF#000000##000000
##428ACF1.003.645.775.77
#FFFFFF3.641.0021.0021.00
#0000005.7721.001.001.00
##0000005.7721.001.001.00

Color blindness preview

Protanopia (red-blind)
#6B8DD2
Deuteranopia (green-blind)
#5880CE
Tritanopia (blue-blind)
#009AA3
Achromatopsia (no color)
#868686

Design tokens & code

CSS
--color: #428acf;
/* rgb */ color: rgb(66, 138, 207);
/* oklch */ color: oklch(61.9% 0.127 249.8);
Tailwind
colors: {
  custom: {
    50: '#85abde',
    500: '#428acf',
    950: '#000000',
  },
}
SCSS
$custom: #428acf;
$custom-light: #85abde;
$custom-dark: #000000;
JSON
{
  "hex": "#428acf",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 207
  },
  "hsl": {
    "h": 209.362,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.61899,
    "c": 0.12732,
    "h": 249.8
  },
  "luminance": 0.2384
}

Semantic roles & 50–950 ramp

primary
#428ACF
secondary
#D5B698
accent
#9245E3
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #428ACF

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

Preview Lab → · Contrast checker → · Palette generator →

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