I just made my own design. I noticed when I added a black or grey to my yellow, it would look greenish. I used student cheap grade watercolors I thought maybe it was due to that. or is this normal? This was really fun for me to do and learn. thank you! my full picture wasn't able to be in the space, fyi. I had more but it was a hassle switching from heir to jpeg , so this one was the piece I really learned a lot about and applied a lot from the class.