code: public DerivedColor getDerivedColor(String parentUin,
                                              float hOffset, float sOffset,
                                              float bOffset, int aOffset,
                                              boolean uiResource){
              return getDerivedColor(null, parentUin,
                      hOffset, sOffset, bOffset, aOffset, uiResource);
          }
docs: Get a derived color, derived colors are shared instances and will be
  updated when its parent UIDefault color changes.
  
  @param uiDefaultParentName The parent UIDefault key
  @param hOffset The hue offset
  @param sOffset The saturation offset
  @param bOffset The brightness offset
  @param aOffset The alpha offset
  @param uiResource True if the derived color should be a UIResource,
  false if it should not be a UIResource
  @return The stored derived color