GTK3

With version 3.0, GnuCash has adopted GTK3 library.

Customization

As noted in bug 791823 (https://bugzilla.gnome.org/show_bug.cgi?id=791823), there is no GTK theming tool available for GTK3. However, this is relatively easy to resolve manually by using a CSS file and placing it at the correct location.

Overview of CSS customization of GTK3: https://developer.gnome.org/gtk3/stable/chap-css-overview.html

Sample GnuCash CSS files:

- https://github.com/Gnucash/gnucash/blob/master/gnucash/gnucash-310.css

- https://github.com/Gnucash/gnucash/blob/master/gnucash/gnucash-320.css

Related wiki entries:

- https://wiki.gnucash.org/wiki/FAQ#Q:_How_do_I_change_the_register_colors.3F

- https://wiki.gnucash.org/wiki/FAQ#Q:_Where_can_I_find_the_gtk_resource_file.3F