When gtk 3.0 doesn't look good in some applications

Copying the folder

"/usr/share/themes/themename/gtk-3.0" 

to

~/.config/

works fine .

A handful of good gtk2 themes have already been ported to gtk3. Some that immediately come to mind are:

> Elegant Brit
> Zukitwo
> Atolm
> Hope

source: https://bbs.archlinux.org/viewtopic.php?id=119251