I love Code Project, this site has helped me quite a number of times. So whenever I have something I feel is worthwhile I will post it.
The other day I needed an algorithm to tint one color with another by a percentage amount. So here it is if anyone needs it.
private static Color Tint(Color source, Color tint, decimal alpha)
var red = Convert.ToInt32(((tint.R - source.R) * alpha + source.R));
var blue = Convert.ToInt32(((tint.B - source.B) * alpha + source.B));
var green = Convert.ToInt32(((tint.G - source.G) * alpha + source.G));
return Color.FromArgb(255, red, green, blue);