Map Ramp v1.1.0.1

Map Ramp creates a gradual blend between multiple colors by using a gray-scale source as a base to map gradient. Any of 5 channels can be used for mapping - Red, Green, Blue, Alpha or Lightness.
Effect can be used for color correction, creativity and even matte tool with the help of additional options. You can use up to 6 different interpolation modes by using additional settings.