Collider inside another Collider not being seen.

I have a large collider box around each of the rooms in my game, when your mouse is over the room an outline of it lights up. This part works fine, however I have objects inside the rooms that also have outlines That I want to light up when you move your mouse over them.

The problem is the when an object is inside one of my large room colliders it isn't lighting up when you put the mouse over it. Objects outside the rooms work fine, but not objects inside them. Is there a way I can have the mouse look for objects inside of the room colliders? It would be better if when you moved your mouse over an object inside the room, the room outline stopped glowing too.