Cone 6: Blue Hydrangea is a blue floral inspired glaze that contains yellow and white crystals. As the crystals melt, large white blooms and smaller yellow blooms appear in the glaze. Cone 10: Color changes to blue. Crystals fade slightly. TIP: SW-207 Chambray is the base glaze. For a lighter crystal effect, you may try applying two coats of SW-207 Chambray with a third coat of SW-170 Blue Hydrangea.