While far from the standard paint scheme, there were a few cars painted Conrail Blue.
There was one, X72 269879, painted as a test. This car never left the Hollidaysburg car shops in the blue scheme. This car used the standard Conrail paint stencils but with "Conrail Blue" paint.
There was another one that served as storage in Baltimore, MD at the Mount Vernon Flexi-Flo terminal.