Boy Kevin - you're really testing us aren't you?
Well in the spring, when new shoots come out, you might have also noticed that the new shoots are not just red, but white and red. The chloroplasts have not yet developed to start photosynthesis in these shoots. The new shoot growth is being supported by sugars converted from starches stored in the roots and canes.
As the shoots open and develop, the chloroplasts form, which are needed for the green coloring, so then the leaves and shoots turn green, and photosynthesis begins.
Some roses are quicker at this than others, so that is why you see red shoots on some roses, and green shoots on others. It does not effect the health of your rose in any way. Not to worry!
VAL