Who Me Too'd this solution

Who Me Too'd this solution

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You'll find plenty of other similar reports here, for the previous XPS generation too, because the source of this specific banding problem is the Dell Premier Color app. It can only be corrected by disabling it, and  clicking Intel Graphics Command Center > Display > Color > Restore to Original Colors. This will leave you with the native wide gamut for Windows desktop and non-color managed apps though - i.e. everything will be oversaturated. But you can at least have proper color accuracy and smooth gradients without banding in color-managed apps with a proper ICC profile.

Dell Support will almost certainly point you to this knowledge base article that attempts to blame the Intel graphics hardware =

Color Banding with Dell Premier Color Application with Intel integrated Graphics

However, I contacted Intel Support about this directly, and after much back and forth their conclusion was: "The issue is actually not a limitation on the Intel Graphics hardware and driver but rather the ability of the Dell Premier Color to work together with our Intel Graphics driver." (email)

That seems pretty definitive. Since Premier Color has been broken like this for over a year, we would hope that two big companies like Dell and Intel could put their heads together and sort this out. Dell Premier Color is advertised on the Windows Store as "a software utility that gives you the color quality and the fine level of detail you require for your color critical work, such as CAD/CAM, graphic, game or animation design, video editing or media creation, on Dell laptops and Precision Desktops." Perhaps Dell will take their own words seriously at some point.

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