If one of them makes the text clearer or more stable or easier to read in any other way, then tint your iPad’s screen. Matching Light — If you see no difference with the colour test above, you can still make reading more comfortable by matching the colour of your screen to the colour of the ambient light. The colour of light doesn’t matter at all when reading paper, because paper always reflects the ambient tint, but if a screen glows a different colour than the background, it will distract.