Hello, I think its possible, but nobody should do such crossbreeding. I saw a lot of "blue" rhinos, but I dont know if this is another subspecie or only a colour morph.
:to cross a rhino and a lewisi? strange question, i know. i was just wondering cause my rhino(not the one from bob but the one i found here at the local reptile store) has some amaizing blue color some people would kill for in a lewisi cross. does the color fade with age? if so, doesnt seem like it 'cause it seems to be getting brighter.