Colorizing + Hue Shift over time of an image?

I have an image, that is a white lines image. I would like to colorize it, and then affect it with a hue shift over time. Currently my background is only using a hue shift formula that shifts over time, which is $tu(seq, 0.001, 0, 100)$ - I first need to colorize my white lines image somehow, then integrate this formula. Any ideas? I'd like to keep them all bright colours, which is why hue shift works. I would prefer not having a formula that results in browns or greys. Thanks!