LESS-like Workflow for colours?

Hello,

sorry for the potentially noob question: how can I define custom colours for a theme? Can I do it inside Bootstrap Studio? On the internet, two main ways are described to customize a bootstrap theme: by editing the less files or by adding a custom .css file. So far i have the impression that BS only supports the latter – am I mistaken? So, to rephrase my question: can I (re)define global parameters inside the app?

Keep up the good work!

Cheers, dimitar