A quick library that allows quick selection of Material Colours. The official colours are documented here (from the Google palette);
https://gist.github.com/daniellevass/b0b8cfa773488e138037#file-android_material_design_colours-xml
All I've done is created a library to allow easy access.
Usage is like this;
B4X:
Dim mc As MaterialColors
Activity.Color = mc.md_teal_500