Difference between close buttons of windowed mode and full screen shy UI

[TheShaunSaw]

In the latest Canary Version 88.0.678.0, the colours of the close button in shy-UI are different from Windowed mode. The cross of the close button is black rather than white and also the red colour in shy UI is dark than Windowed mode. The close button of the Windowed mode is correct. The issue is shown in the screenshot.

Close button in Windowed Mode

Close button in shy-UI of full screen mode.

[#2]

@TheShaunSaw Actually I like the ShyUI close button, how do I get it?

[#3]

Available and enabled by default on Edge (including stable). just press F11