Windows 10 May 2019 Update has color reproduction issues - here`s the fix
(Windows Phone Central)

Are you seeing vertical stripes on gradient colors after installing the May 2019 Update? It`s a problem with Windows 10, but you can get around this issue with these instructions. Users running the Windows 10 May 2019 Update seem to be facing a bug that is causing displays to render colors incorrectly, even though, a recent update should have fixed the problem. According to a support page from a computer display manufacturer called Eizo and various user reports on Reddit (WinterBrave) (efreetcs), after installing the May 2019 Update, color tones don`t render correctly, causing a banding (vertical stripes) effect despite the graphics hardware or monitor you use. It`s unclear the exact source of the problem, but it would appear that there is an issue with the Windows Calibration Loader that`s conflicting with the graphics driver making gradients not look smooth....