In gouache, the blue interlining should be particularly bright, but it should be gray, that is, blue-gray How to draw? How to mold a dark jar?

Blue interlining: 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.

The dark jar is separated by several big noodles. Although you look deep, on the screen, except for the boundary between light and dark and the depth of projection, everything else is slightly gloomy and different. Finally, sweep a touch of environmental color, so that the sense of volume comes out.