Different Colored And Altered Mirrors
Silver Nitate with an added color could turn one mirror or parts of a mirror a different color or colors. If you need to see your true color you would just add the fancy colors around the edges or out of your viewing area. You could also have a glow in the dark mirror. You can basically add any chemical or chemical process to a silver nitate mirror backing for any effect you want granted you can still see yourself clearly.
Reward: Simple... One of each kind to fill the rooms with mirrors.