Here is a theme that offers different code colouring options for CSS, PHP, HTML and JS: mode-aware-code-theme.zip - Yes, its bright, I need soemthing I can see as I'm getting on a bit and the eyes are not what they used to be
If you are on Windows copy the folder containing main.less and package.json to path something like: C:\Users\username\AppData\Roaming\Adobe\Dreamweaver CC 2019\en_US\Configuration\Brackets\extensions\user\
I think the path on Macs is something like: Adobe\Dreamweaver CC 2019\en_US\Configuration\Brackets\extensions\user\
Restart Dreamweaver if already running ....