Color of biscuit surface samples was determined according to the tristimulus color system described by Francis [24] using spectrophotometer (MOM, 100D, Hungary). Color coordinates X, Y & Z were converted to corresponding Hunter L*, a* & b* color coordinates according to formula given by manufacturer. The chroma (C) represents color saturation or purity was calculated from C = (a2+b2)1/2 and total color intensity (a2+b2+L2)1/2.