I have checked colors and are interpolated fine.
Please see color scale in image. Its my own label made, and uses that same color.
I verified following way:
var R = c.R;
var G = c.G;
var B = c.B;
Console.WriteLine("rgb(" + R + "," +G + "," + B +")");
/*
rgb(108,89,176) purple like
rgb(132,95,168) purple like
rgb(157,102,160) pink like
rgb(181,108,152) pink like
rgb(206,115,144) pink like
rgb(230,121,136) red like
rgb(255,128,128) red like
rgb(59,76,192) blue like
*/
I’m not clear about colors.InsertNextTuple3.
I started calling it twice, as vtp files working with twice and else raises unsafe errors.
But calling once or twice has no effect on VTU currently.