Hi, I am sorry but you don not seem to understand these "Standards" these are the result of the Video being Displayed, the TV, only knows it is whatever because the whatever "Tells" the TV, what "Format" to choose, either 1080p 1080i 720p 720i and 480p and 480i you see these are all "Formats, you TV doesn't decide what to display, and you cannot "Force" a non ****p or i, into any other, ****p or i, format. IF the image displayed on the TV is "Encoded" in that format, that is the Format that will be displayed. It is NOT a function of the TV set.
Your problem with your colors to me sounds like what happens when you do NOT have the COMPONENT Video, cable wired up correctly, it must be Y, Pb/Cb, Pr/Cr, color to color, but MORE importantly, Y to Y, Pb to Pb, and Pr to Pr... if it is wired wrong you get that condition you have. Check you are wired correctly. The other COMPOSITE, Video out, is the Yellow, Video, plus Red & White, for Audio. NOTE the Red & White, are required when using COMPONENT Video too.
So the best result is obtained using 1080, but as said, it is the MEDIA played that determines that NOT the TV settings.
Please have alook above.