Hi darrenpanlaqui,
Not currently as far as I'm aware, although it would be super useful (#justsaying 
).
What I do in the interim is build tablet and phone formatted pre-themed apps using layout, colours, fonts etc. and encourage users to start with these as templates and build from there.
The templates also set up easy-to-reference colours and fonts, so for example you can "Set(myTemplateBGColour, Green)" up front and for new screens simply set the background colour to myTemplateBGColour. This works for pretty much any element, including headings, body text, icons etc. and is especially handy for brand-based colours that are RGB or hex specific.
We also built some of these to use centralised theming and an app that allows us to set up the theme by selecting colours, fonts, etc. and save them - changes are automatic without the need to publish an update and it can be managed centrally - it helps if you're prepared to fetch the data up front and it depends how far down this particular rabbit hole you really want to go as it can get quite complex! 🙂
Kind regards,
RT
