Very many white cats with blue eyes are deaf while a white cat with one blue eye and the other a different color, are usually deaf on the side of the blue eye. This is a hereditary deafness and is linked to the so-called W gene.
Behind Blue Eyes - Just a point of fact - most of these cat eyes are Photoshopped by morons who don't know what color eye goes with what breed etc. Some are very pretty, just not natural. That is so cool!
Never hesitate to adopt a black cat! They are the least adopted color of cats due to a stupid superstition. I miss my black kitties. Maybe one day I'll find another sweet black kitten to adopt and join our other fur babies.