You can get color chip number from a oem parts manual usually. I think color rite is who I used to use for customers.
I painted a frame for a 1995 ZX6R a while back. Spent 2 hrs at paint store looking at paint chips in the hot sun! I found a match that was close enough from a Ford Wheel.... I suggest you find an autobody supply store and start looking at chips...Or have them scan the frame and see if they can match it... I sprayed mine with a clear but with about 60% gloss finish