Please assign this to Chromium/Chrome OS. Unfortunately, this cannot be chosen at https://crbug.com.

To display smooth color gradient on a low bit depth device Chrome needs to apply so-called dithering.
One notable example is madVR renderer for video players in Windows.
Another one is DitherTools plugin for AviSynth.

Is the monitor really a low bit depth device? I wouldn’t think it’s that bad.

Indeed, dithering is helpful even on a good display (8+ real bits per RGB channel) as the artifact also depends on how close/similar the start & end colors are. The closer they are, the fewer gradations in each RGB channel would be used over the entire filled area so the banding will be much more obvious as we can observe on the attached photo. 

This sounds more like a feature request to add dithering for gradients on Chrome OS? cc'ing some CroS graphics people but I'm not sure if this is feasible.

I see two possibilities here:
- the 8 to 6 dithering that the rockchip display driver does broke at some point. If so we can fix the driver.
- the Chrome-side blurring is generating banding, that would be UI's territory

So first step is to figure out which one it is, I will make a build and see.

Hw dithering is working fine on my jaq, so this is a UI thing. At first glance it seems like the blur effect on the background generates this banding. Over to Albert to triage.

Issue 769523 has been merged into this issue.

Unfortunately I am unable to access issue 769523. Could it please be made public?

Hi pm.molgen@, the issue in #11 has the same root cause mentioned in #8 and #9: Chrome-side blurring is generating banding.

This should really be higher than P3