In order to support forwards and backwards compatibility on all themes, Mable uses namespacing in order to ensure that no CSS classes will collide.
Class selectors in a namespace only apply to strings with a - after its name, such as element-white, but not just element. Mable uses other class selectors that are single words not in this list but these are not namespaces.
Here is the list of namespaces Mable currently uses:
sectionelementcontainercolcolstext