Systems and methods of determining optical flow are provided. For instance, a plurality of input color vectors respectively associated with a plurality of input pixels can be obtained. Each input pixel can have a known position within an image. A color rate of change associated with each input pixel in the image can be obtained. An optical flow estimate associated with a subject pixel within the image can be determined based at least in part on the plurality of input color vectors and the color rates of change associated with the input pixels in the image.