What color is gouache blue interlining! ? And how to adjust the color of tomatoes?

Hello, I am an art major. I hope I can help you:

1, blue interlining: the front should be bright (protruding) and the back should be slightly gray (sense of space and jumping).

High brightness and gray do not conflict. Adding white to sky blue (or other light blue) will also reduce the purity of blue interlining. This is the drawing of the front cloth. At the back of the picture, in order to open the space, you can mix and match some pink, sunrise red and light green. Look at the picture. Which one do you need? Just coordinating. I don't mind using pink blue or other gray systems directly, it will be monotonous.

2, tomatoes: first spread a background color: red with some horizontal brush. (For bright colors) Then draw two dark parts in deep red. Then sweep it in the dark with yellow and green, or add other environmental colors. Draw the tomato head in green and highlight it at last. In this way, tomatoes will be bright and look tender and fresh.

You can ask. Please accept it if you are satisfied. Thank you.