GTKD - overrideBackgroundColor of Button doesn't work

[Gerald via Digitalmars-d-learn]

On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:
> but i just wanted to mention (in case you are not aware of it) 
> that the CSS can be embedded into the D source. this is what i 
> did to fix GTKs terrible design mistake for the background of 
> Notebook:

What a great tip, I never knew you could do that.