Depends on your design. If the center of the diagram is at the origin, you can add an offset to the coordinates of the section before it's drawn. If, for example, the segment were one quarter of the piechart from 0 to 90 degrees on the unit circle, you could offset the segment along the vector that bisects the section (1,1).
But, if you want some decent feedback, post minimal working code so we can go over it.
Also, if the image you linked is yours, you are waaayyy beyond color-blind.