Colors like red, black, and white express the feeling of anger (mostly red and black but white could be used as well) red resembles anger, black may resemble emotions like depression and other emotions along that line. White is most often shown for happier emotions or i use it to show memories, grace, and other feelings along those lines. While white can show those emotions it can also show things like something distant from you, bad memories, or to show forgetfulness. White may be more risky but i can work well if you know how to manage it. For shapes try to use sharp shapes that may look threatening if you manage it in a certain way. I suggest using x’s, sharp lines, and triangles. Whenever i draw stress relief or vent art i use untame scribbled lines that look random and wild. If you need more help i could help draw some shapes out for you.
I would say red and black show feelings of anger. Shapes I'd say probably messy shapes. Rough textures. Un-neat lines. I don't know what values I'd use.
