@terence7 Thanks for the video – it’s clear now what’s happening. Whenever you enable “Use Nodes” you’re turning on the default Cycles material system, as you notice you get a bunch more options in the material settings. When this happens you have a diffuse material color AND a viewport display color. The diffuse material color does not update in the viewports default solid shading mode, which is why you’re not seeing the color update. But if you change the “Viewport Color” in the material “Settings” section, that will update in the viewport as you expect.
I know that’s quirky and unintuitive. Personally I think the viewport color should adopt the diffuse color until the user changes it. But I also understand the reason why they’re separated. Since Cycles materials are nodal, it’s just as likely for there to be no diffuse color node as it is to have one. So it’s not a reliable parameter for the viewport color parameter to source.
Anyway, thanks for the video. I hope this answers your question!
