Question

The colour of an opaque object is the colour of light which it _____________ .

Answer 1

1. When light falls on an opaque object, most of the colours are absorbed by the object's surface and the colour reflected by it is considered the colour of that object.
2. E.g. if any object looks red, it means that the object absorbs all colours except red which is reflected by that object.

Hence, the colour of an opaque object is the colour of light that it reflects.