Abstract: A blinking set of displayed collinear elements alternating in color allows simple, rapid, and accurate determination of color misregistration or misconvergence in color television video displays and color television cameras. Operators can readily detect misconvergence due to a shift in a trend line of the collinear elements which is made quite noticeable by repeatedly switching between two patterns, thereby introducing an apparent blinking motion of the misaligned elements in displayed areas that are misconverged. The blinking motion can also be detected by automatic means, thereby eliminating the need for an operator.