no there is no real paint scheme to rv's, you might even find they were cheap and just used a stripe roller or even maybe a roll of sticky tape on it, on one i had was painted on another it was sticky tape. from the same company. redwing
i HAVE A 13 FT 69 YELLOWSTONE AND IT HAS THREE STRIPES
As you can see, yours has 3 stripes, the Winnebago pictured above does too and you mentioned a Scotty that looks "a lot" like yours as well. One additional thing, in your travels on the road and on the internet, you'll also find that striping & color schemes of the major manufacturers were often closely copied by smaller RV companies.
and it may not be original stripes for a yellowstone either. as you can see in the broshure the other url points to a 69 both are the same scheme.