Suggestions for a topper to cover just top of blinds?

We just painted the sunroom from sage green walls/ ceiling to this light beige walls and light blue ( tint of gray) ceilings. We Have to have blinds for the East morning sun. After the suns goes up over the roof the blinds come up . Once the blinds are raised you see about 6 to 8"..... this is the part I would like to,cover with something. I tried painters cloth but this textured beige color made our window wall look yellow. If my blinds were beige I would not do anything...too expensive to replace when u have 9 large windows.