ColorInterpolator { eventIn SFFloat set_fraction exposedField MFFloat key [] exposedField MFColor keyValue [] eventOut SFColor value_changed }Explanation :
This node interpolates among a set of MFColor key values, to produce an SFColor (RGB) value_changed event. The number of colors in the keyValue field must be equal to the number of keyframes in the key field. The keyValue field and value_changed events are defined in RGB color space. A linear interpolation, using the value of set_fraction as input, is performed in HSV space.