Return the alpha transparency per R color
col2alpha(x, maxValue = 1, ...)R compatible color, either a color name, or hex value, or
a mixture of the two. Any value compatible with col2rgb.
numeric maximum value to return, useful when the downstream alpha range should be 255. By default maxValue=1 is returned.
Other jam color functions:
alpha2col(),
applyCLrange(),
col2hcl(),
col2hsl(),
col2hsv(),
color2gradient(),
fixYellowHue(),
fixYellow(),
getColorRamp(),
hcl2col(),
hsl2col(),
hsv2col(),
isColor(),
kable_coloring(),
makeColorDarker(),
make_html_styles(),
make_styles(),
rgb2col(),
setCLranges(),
setTextContrastColor(),
showColors(),
unalpha(),
warpRamp()