flush with something
1. Lit. even with something; sharing a surface with something. The edge of the sink is flush with the counter. The wood flooring is flush with the carpet so people won't trip.
2. Fig. [of a face] red with anger, embarrassment, rage, etc. He faced the woman he had dreamed about all his life. His face flushed with recognition and his heart pounded. Ellen's face flushed with embarrassment.