Say, we can give colour while electron passing through slit. How would be the result, how would colours be distrubeted? Or, is it impossible to colour, somehow?
Electrons don't have colors; however, you could alter the spin. In this case the interference would vanish.
For an interesting presentation by an expert, read the Feynman Lectures on Physics, vol III. This provides an excellent introduction to quantum physics: http://www.feynmanlectures.caltech.edu/
Another resource is the Einstein-Bohr correspondence, which investigates wonderful thought experiments constructed by Einstein in order to avoid the consequences of the Heisenberg Uncertainty Principle. See this article, and references: https://en.wikipedia.org/wiki/Bohr%E2%80%93Einstein_debates