Polyester/cotton blend fabric was dyed with Chemistron dye-a mixture of reactive/disperse dyes. Dyed fabrics were subjected to radiofrequency (RF) plasma treatment of different duration and were subsequently treated with metal salts. The effect of surface modification by plasma and dye-metal complex on colorfastness to light is discussed. Evaluation of the improvement in lightfastness was made using the CIE system of color measurement with a standard illuminant D65 and 10 degrees standard observer. The color parameters and color deviations were obtained by Data flash-100 color measurement spectrophotometer with chroma QC 3.0 color quality control software.