Treatment 4: Good-bye Red Sky Custom-Made Frame: #SH15 – Shades of Verona Collection Ready-Made Frame: #15SH – Shades of Verona Collection Top Mat: Baltic Blue Bottom Mat: Williamsburg Red We've toned down the heat with a pensive, Baltic Blue mat. Orange has met its match! Similarly, use these complementary primary color combinations to achieve the same effect: red and green, yellow and violet.