Why does my object remain gray in the 3D View after changing its 'Base Color'? I want to create a radioactive torus. First I think I need to change/set a color. I've created a torus and then (in material properties) a changed in Edit mode to green (see the snippet below).
I've also changed Emission to RGB green. Not only that the emission doesn't work, even the change color doesn't work: it's not green but still gray.
What's wrong with my Torus?

EDIT for solid mode
You have 2 materials in your material list, the one you've assigned is blank, you need to assign the other one (or simply delete the first one):