Please, read the template, you missed by posting in a wrong thread. 
Missing information requested in the template may result in not receiving assistance
Make sure you have done the following before you post:
- Search the web and forums
- Read How to search for solutions the right way | Garuda Linux wiki
- Read FAQ and Tutorials Table of Contents
Issue still unresolved? Then:
- ONE issue per topic.
- Describe your issue in detail. The more we know, the better we can help
- Show us the results of your searches, and what you’ve tried
- After rebooting, post the FULL output of
garuda-inxiin the body of the post (not linked externally, or collapsed with the “hide details” feature)
- Format terminal output (including your
garuda-inxi) as a code block by clicking the preformatted text button (</>) , or put three tildes (~) above and below the text
Without garuda-inxi this request will be moved to 4xx Client Error > 412 Precondition Failed
Use pacseek for all Garuda apps and search the forum and the internet for themes you like and how you can easily change them.
The maintainers and developers create the Garuda Linux desktop interfaces according to their personal preferences, which they can change themselves if they wish.
Have you already tried the light version in the RANI settings?