I turned my computer on. I turned my computer on the other day and the colour wasn't normal, e.g.

Question

I turned my computer on the other day and the colour wasn't normal, e.g. something that was pink is now grey. I played around with the settings and still nothing has worked. I thought that the actual screen was broken, but I have changed the screen today, and the colur is still the same! It is really annoying!