Walnut fruit skin has compounds that can be used to prepare green color. Color stability of the dye extracts always considered by researchers. Metallic ions help stability of these compounds during of time by complex formation. The purpose of this study provides extracts of green color with more stability for use in the textile and dyeing fibers. Green color of walnut skin was extracted by methanol and affected by metallic ions (iron, copper, aluminum) in two different pH (3, 4.5) with three different ratio (1:1, 2:2.4:4) of juice and metallic ions. Then, color parameters L*(lightness) a*(green-red) b*(blue-yellow) in treatments was measurement by colorimeter in 10 days. Concerns to results, cupper treatments has better effect on green color stability than iron and aluminum treatments in more acidic conditions. Also compare of three different ratio of juice and metallic ions show that 2:2(iron and aluminum treatments) and 4:4(copper treatments) has better effect on a* factor in pH =3. Therefore, our results show the color stability by metallic ions (especially cupper) in acidic condition which can use to produce the juices with better color quality for coloring of fiber in loom.