Hi community if someone like material design themes are happy to inform you that I played with one of them : Adapta .
Now this theme is build to match with maia color and the pkg is in our unstable branch : adapta-maia-theme
if anyone want install and try simply do
sudo pacman -U http://h1860261.stratoserver.net/manjaro/unstable/community/x86_64/adapta-maia-theme-184.108.40.206-3-any.pkg.tar.xz
also 32 bit can be install
for reference see here but keep in mind the color is maia