In nature biotechnology and nanotechnology combine to create impressive structures with specifically designed functions. Some organisms, despite the absence of pigmentation, possess remarkably brilliant colors, particularly in the blue and green wavelengths, due to optical phenomena such as reflection, refraction and thin-film interference. Examples are the intense coloration of butterflies, snakes, hummingbirds and peacocks whose color is created by the difference in the reflective index of stacked thin film layers comprised of alternating materials, such as chitin and air which have a high and low index of refraction respectively. Colored polymer thin films can undergo perceptible color shifts when geometric periodicity of the layers is varied. In our attempts to better understand these processes, stacking of structurally colored polymer thin films of varying index of refraction as well as altering geometries to achieve this effect were investigated. Tunable, structurally colored biopolymer thin films have a variety of potential applications, including use as novel reflective camouflage materials and as a platform for an optics-based sensor.