Yes in Sweden red and white are ok to register but there is not ok to register red roan for some reason. There are instead called orange roan or lemon roan.
IF you have one orange roan color, and a orange/white colour shouldnt it. be a solid orange allso?
For example:
Red, red/white and red roan
Orange, orange/white and orange roan
Lemon, lemon/white and lemon roan
? I just searching for some logic here...