I tried a yellow flower in color pencil. I decided to use white illustration board - I wanted the yellow to jump more. I found it hard when doing the pink in the last flower to get it as perky as I wanted on the dark background, so I tried a light background. I think it worked better. Note to self. choose the color of the 'paper' depending on the subject matter. Light color flowers come out better for me when I use the light beginning.