The purist amongst members only like things to look the way they were intended - which is cool and there way
but it is also your bike to do with what you like
you have to things to think about here - will every one like it (of which you have to ask yourself do you care ?) and will it be easy to sell if you want to give it up ?
some times doing a build a different colour can work if thought out well - but some times it just doesn't work
have a look at all the other Masters on museum and see what works and what doesn't - some times it's just just a couple of parts from working or just the wrong shade to make it work
at the end of the day it's your bike - you don't have to rush into it - take a little time to think colours out - it will change each time when you do more searching
look here
http://bmxmuseum.com/bikes/haro/cheers B