The library comes with three node color themes, where it has custom colors for Redshift nodes (material nodes, light nodes, and render-related nodes).
You can switch between all the available themes by pressing D on the network editor and look for the Themes tab and then, switch the “Default Node Colors” theme for the one that you want to use.

This is the main theme, a custom theme based on multiple design decisions where the nodes are not saturated and with more balance in general, a theme focused on highlighting the most used nodes based on the following categories:
For those nostalgic users that come from C4D or are still using it in parallel, this theme uses the Node Editor color scheme, which may help you to feel at home? 🤔
If you are a Redshift OG user that comes from C4D, you might remember the loved/hated shader graph from C4D. , tThat node manager that gave us a lot of headaches to select tiny nodes, you might like that color scheme and want it back again 👴😋