Painting - Paining the inside of a window frame

I am paining my famaily room and have run into a problem. I am using three colors; lt blue on the top (separated by a 1" paining molding), green in the middle and yellow on the bottom which is a wainscotting. The ceiling, moldings, doors and window sills are all yellow. I have windows that start near the bottom of the wall and go almost to the top. Which color to I paint the inside of the window frame? Do I wrap around with the color on the wall or do I paint the inside yellow with the trimmings? Please help!

This is really a matter of preference, and I am no interior decorator. I would wrap the colors, use a ruler and pencil to make a straight line to paint to. Make sure one color is dry before going to the next. If you don't like it, paint over with one of the solid colors.