How cool! Did you paint this portrait? I want to know what paints you used! I tried to open the picture in its original size, but the forum compressed the quality of the picture. I think it's either gouache or acrylic, am I right? Although the right side of the picture looks like blue watercolor, but I could be wrong. I've always had trouble mixing colors. As a kid in art school, I often talked to the teacher about color theory after basic classes. He suggested I buy a lot of paintings to paint by number. In this way, I learned the transitions of color from one sector of paintings to another. And it helped me.