BACKGROUND: A growing concern for children's social development is aesthetics. In order to satisfy patients'aesthetic needs, tooth-coloured restorative materials have been widely used; however, occasionally, discolouration may occur, leaving parents and patients unhappy.Although oral rinses are frequentlyused to support periodontal health, regular use might cause discolouration. Many herbal mouthwashes are becoming more and more popular because they don't contain alcohol, dyes, or artificial components. AIM: The study was to evaluate effect of three genres of mouth rinses on the colour stability of aesthetic restorative materials widely used in pediatric dentistry. METHODOLOGY: Three types of mouth-rinses(Listerine, Hiora, and tulsi extract) and three restorative materials were used in this study (GIC, RMGIC and Giomer). Ninety disc shaped specimens, thirty from each restorative material were made in prefabricated celluloid mould with dimensions of 10*2mm.All specimens were stored in artificial saliva at 37˚C for 24 hours in an incubator. The initial colour values were recorded with spectrophotometer according to CIELAB scale. After baseline evaluation, the specimens were divided into 3 subgroups, according to the testing and control storage solutions (n=30).