In the following design options, I've tried to demonstrate an inside and outside corner color transition. What I've concluded, is that accent walls utilizing inside corners, rather than outside corners, lends itself to a stability in the space. However, what's interesting, is that after experimenting with the soffits, I tend to like an outside corner color transition between the soffit underside and the soffit face. It tends to lightens up what otherwise would be a weighty appearance.
1. Horizontal outside corners utilizing color transitions, appear to reduce the overhead weight of architectual affects
2. Vertical outside corner color transitions appear to create a veneer affect
3. Inside corner color transitions add weight and stability to a space