Mermaid Melody Pichi Pichi Pitch, Jewelpet Twinkle☆ Recommendations
Both Mermaid Melody and Jewelpet Tinkle involve girls using magic and transforming into cute dresses and overcoming trials of their own lives. The characters involved are mainly pre-teens/young teens. The main three girls all have the same color codes during transformation of pink, aqua, and green. Also the three female leads have the same personalities.