Abstract: An apparatus and method for testing color sequencing of SECAM color television signals whereby any reversed color sequences will be immediately identifiable is provided. Specifically, the color sequence of SECAM picture monitor determined by white lead-in during the back porch interval or by Line Identification Signals during the vertical blanking interval is compared to a reference which can be internally derived and/or derived from another picture monitor or generator. If a difference is obtained, means are provided for visually or audibly indicating the color sequence error.