Currently Pinta uses a primitive color choose window from GTK4 (2.1.1 from GTK3), it does not contain normal, convenient options: "Red", "Green", "Blue" and "Opacity".
Is there an alternative GTK component? Or maybe some flags that change it?

P.S. Can I use GTK 4.6.9? This is the latest version that available in xUbuntu 22.04 LTS.
I can just change configure.ac, but I don't know all the consequences.