I agree with Izy as well (but then I have to keep her sweet so she gets on with her mystery block tute :wink: );
Seriously, I think the tan inner border is a must - I agree with the earlier comment about blocks the same fabric as the border bleeding into it being a bad thing;
I think a darker outer border makes the tan stars pop more!
Can't wait to see how you do it - sure to be great whatever you decide!
K x