Added example of using the alpha channel for RGB and sat,val for HSV
Added example of using the alpha channel for RGB and sat,val for HSV

basnijholt/holoviews,ioam/holoviews,basnijholt/holoviews,vascotenner/holoviews,basnijholt/holoviews,vascotenner/holoviews,mjabri/holoviews,vascotenner/holoviews,ioam/holoviews,mjabri/holoviews,ioam/holoviews,mjabri/holoviews