If your wife has a light complexion, she should use light colored eye shadows and lipsticks, like pastel pinks,blues,and greens. It also depends on her eye and hair color.
I would say light brown or tan eye shadows, brown mascara. Bright lipstick since people with pale skin usually have light lips and a bright lipstick will give them more color. Also, don't forget blush. I suggest Nars "Orgasm"