I thought I would put this up to assist others, after countless hours of searching I could not find a definitive guide.
The finally stumbled across this post by D4vy. I have modified his instructions to suit 2024 rather than 2021.
INSTALL THEME
- Open NodeRED, Click Hamburger Button (Top Right) on NodeRED
- Select Manage Pallette
- Select Install Tab
- Search for ‘theme’ and select @node-red-contrib-themes/theme-collection
- Click install button.
ACTIVATING THEME
- Go to Home Assistant Settings
- Go to Add-ons
- In the list of installed Add-ons, select NodeRED
- Go to the Configuration tab
- Change the value of the
theme
tomonokai
- Click SAVE (it will prompt you to restart the add-on)
(there is a SAVE for Options and another for Network on the Configuration page.)
- Confirm to restart the NodeRED add-on
- Enjoy the theme