to remove color from a point. If color is not applied to a point, then 2 colors from nearest assigned points (left and right) would be blended over it.Note
: If color from 1-st or 9-th point is removed (points are enumerated from left to right), then the color from nearest assigned point would fade to transparency. PNG Transparency (all images are generated in .png image format) is supported by all modern browsers. Internet Explorer earlier than v7.0 however, do not support it and would render transparent area with solid color.