Objectives: The aim of this study was to evaluate the effect of applying Fluoride varnish and Amorphous calcium phosphate gel on the enamel color and surface roughness; post bleaching, for two different time intervals. Methods :Sixty sound freshly extracted human anterior teeth were selected and kept in individual tube in distilled water. All teeth were polished using brush and detartrine polishing paste, and then bleached using in-office chemically activated bleaching gel (40% hydrogen peroxide Opalesance X-tra Boost gel). Teeth were divided into three groups, twenty for each group, GroupA1: bleached only (control group); Group A2:after bleaching; microabrasion using 18% HCL and pumice then application of fluoride varnish for two different time intervals; GroupA3: after bleaching and microabrasion; application of amorphous calcium phosphate gel for two different time intervals. Computerized image analysis was done for all teeth at (base line), before and after bleaching; after microabrasion and after application of remineralizing agents twice, using zoom stereomicroscope. Data were analyzed using ANOVA and paired t- test at the 0.5 level of significance. Results :Average surface roughness ( Ra) measurements revealed that after bleaching procedures there was statistically significant increase in (Ra) measurements (P<0.03) with GroupA1 and (P<0.001) with Group A2& A3 . And significant increase in surface roughness after microabrasion with Group A2& A3. While significant decrease in surface roughness after remineralizingagents application in Group A2and Group A3. Image analysis revealed that there was a statistically significant increase in mean color value of all teeth after bleaching, microabrasion and after application of remineralizing agents. Conclusions :Within the limitations of this study , Bleaching regimen significantly increased the mean gray scale value and the enamel surface roughness of all teeth. Microabrasion procedure significantly increased the mean gray scale value and the enamel surface roughness.Applyingremineralizing agents significantly increased the mean gray scale value and the enamel surface roughness values. Applying amorphous calcium phosphate gel as remineralizing agent produced significantly more increase in the mean gray scale value of teeth and significantly more decrease in the enamel surface roughness values. Increasing the time of remineralizing agent application produced significantly better increase in the mean gray scale value of teeth and significantly more decrease in the enamel surface roughness values.