The aim of this study is to understand the effect of mordants on cotton dyeing using M. Tenuiflora extract and to observe the effects of indigo dyed cotton fabrics, which are in fashion. Two different types of cotton fabrics were used indigo dyed, white ready to be dyed. Each of the fabrics was dyed with two different concentrations of M. Tenuiflora extract. Six different metal salt mordants were used. After dyeing and mordanting of fabrics, colorimetric and fastness values, such as fastness to light, washing and rubbing, were measured.