Can't change network widget colur

**Describe the bug🐛**
Thank you and apologies if this is something obvious that I've missed. :)

**Screenshots (Optional)**
![image](https://user-images.githubusercontent.com/605742/152586882-a7685d2d-fbe3-40f7-bdd3-e62b50fb3103.png)

**Desktop (please complete the following information):**

- MacOS Version: 12.1 
- Version of the app: 2.1
