This effect was generated in Filter Forge, a Photoshop plugin that allows you to create your own filters.
This fliter can change the colors of the normal spectrum gradient used for the hue channel of an image.
Move the 9 bands to change the new gradients colors.
To see how the new gradient relates to the normal spectrum, check the "SeeGradient&Sp
The "Shift Gradient" slider shifts the gradient similar to how the hue shift part works in the "Hue/Saturation
Note: Since the lifesaver image essentially only has one color, you can't really see it's effects (since this filter deals more with relationships between colors).
hue color colors channel controls elevation gradient
This filter has earned its author one of our rewards. They are given to the authors of popular filters and include a free copy of Filter Forge.