Kodi 17 Washed Out

This may be hard to describe without a visual reference but it seems that this started with Kodi 17 and has continued with 17.1 but when I launch Kodi on Windows 7 sometimes it may wash out colours, especially blacks. This is very easy to see if you put on a movie where it’s letterboxed (2.40:1 for instance the picture is grey vs the black bars which are not part of the picture which are black) or even if credits roll over a black background — the background is a darker grey but very definitely not black. In order to remedy this I’ve exited out of Kodi and re-opened it and this seems to solve this issue. I can’t wrap my head around why this would be happening in the first place. Any help would be much appreciated.