A CR-300 colorimeter® (Minolta Co., Osaka, Japan) was used for instrumental color evaluation. The CIE Lab color scale (L*a*b*) was used with a D65 illuminate (standard daylight) and a 10 angle. The L*, a* and b* parameters were determined according to the International Commission on Illumination (CIE 1996). Using reference plates, the apparatus was calibrated in the reflectance mode with specular reflection excluded. A 10-mm quartz cuvette was used for the readings. The measurements were performed in triplicate (Mun et al., 2009).