Just look for plugins for it. You can change the theme colours along with fonts/font colours.
My colour highlighter theme is Monokai (SL) and my overall theme is Monokai (SL) too.
Just google sublime theme/colour plugins - you may need to install the sublime package control.
Somasundaram Ayyappan
All of the sublime settings are controlled by
Preferences.sublime-settingswhich can accessed by going toPreferences ▸ Settings. To change fonts, you have to addfont_facekey to the file as follows{ ... "font_face": "Fira Code", ... }For more customisation, checkout Package Control.