For Tv's the colour is caused because the colour signal is hidden as a high frequecy component that older B&W Tv's would ignore. Conversely, a high frequency signal caused by closely spaced light and dark patterns fools colour TV's into thinking there's a colour signal present (as the filters in TV's improved the magnitude of the effect reduced, but it's there to this day in analogue TV).
What you're seeing is probably Fechner Color [0]. I've seen the effect myself, as I recall there was a bit of a craze for demoing it some years back.
What you're seeing is probably Fechner Color [0]. I've seen the effect myself, as I recall there was a bit of a craze for demoing it some years back.
[0] https://en.wikipedia.org/wiki/Fechner_color