Hello, the bikes colour code is on the sub-frame under the saddle but that is Honda's code that you can also find in the parts list, if you are looking for paint companies codes you would have to take a piece with the colour you are after to a paint shop and get a match.

My bikes code is NH-196b and that is for the Pentax colour scheme, if I need a repair I would just go to the local paint shop and match it up.

Most of the colour on these bikes is done with stickers, I think it is just the tank that is painted. It is possible now to get stickers done of course.

If you have a particular scheme in mind there are lots of NSR pics on U-Tube sites to use as a basis, also if you can get hold of a sales brochure they are pretty good to use to get some idea of colour schemes.