Optical interference filters were fabricated using multilayer stacks derived from sol-gel SiO2 and SiO2-TiO2 coatings. Laser processing was then used to modify the spectral properties (color) of local regions of these stacks. Changes in color were analyzed with respect to changes in the individual film thicknesses and refractive indices. Design considerations and some basic limitations of laser firing for tuning interference filter colors are also discussed.