When light waves strike a blue object, what happens to the light waves of all colors except blue?

All colors are absorbed by the object except blue color.

Explanation:

When a white beam of light any object the light beam gets dispersed in its constituent colors. The object reflect a single color and absorb all remaining colors. So the object appears of the color which is reflected by object.

When the light beam strikes the blue object it gets dispersed in its constituent colors. All the colors are absorbed by the object except blue color. Blue color is reflected by the object.

Thus, the object appears of blue color.

In this situation I am pretty sure that all colors except for the blue light would be absorbed. The blue light would be reflected.