Background: Silver diamine fluoride (SDF) is one of the effectual cariostatic agents widely used in minimal intervention dentistry. However, the major drawback of SDF is dark staining after its application. Aim: In the present study, the staining of 38% SDF alone and 38% SDF and potassium iodide (KI) was compared after restoration with glass-ionomer cement (GIC) and resin composite using ImageJ software. Methods and Material: Forty extracted carious primary teeth were sorted into four groups. In Group I and II, SDF was applied and restored with GIC and composite restorations, respectively. In Group III and IV, SDF application was followed by KI and restored with GIC and composite restorations, respectively. Images were captured after initial applications on day 1 and day 14 after restoration. The captured images were imported to ImageJ software and mean gray values were calculated. Statistical Analysis: The mean gray values obtained were subjected to statistical analysis using paired t-test and independent sample t-test. There was statistically significant if P < 0.05. Results: Following the application of SDF and RIVA STAR, the baseline mean gray values showed no statistical significance. On day 1, the mean gray values were highest in Group IV (208.30) and lowest in Group I (178.51). Similarly, on day 14, the highest mean gray values were observed in Group IV (208.45) and lowest in Group I (147.6) which were statistically significant. Conclusions: The restorations after SDF application attained dark stain eventually, whereas with the application of SDF followed by KI (RIVA STAR), the restorations showed the least staining.