On Sat, 2018-02-17 at 21:32 +0100, Wojciech Puchar wrote:
> i want in my program to change background color of the gtk_button to
> red 
> sometimes as a signal to the user.

Although i don't have an answer (sorry) i'll note - i've worked with
people who were red/black colourblind.
I'd really be irritated, too, if my theme had red text, and when it
mattered most i ended upwith red text on a red background.

Liam


-- 
Liam Quin, W3C, http://www.w3.org/People/Quin/
Staff contact for Verifiable Claims WG, SVG WG, XQuery WG
Improving Web Advertising: https://www.w3.org/community/web-adv/
Personal: awesome vintage art: http://www.fromoldbooks.org/
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