Unable to change the color

Is there any other way to change the chat color? as I am unable to change its color from this file
Thanks

<img width="1235" alt="Screenshot 2022-10-24 at 12 01 18 PM" src="https://user-images.githubusercontent.com/58821374/197466592-6d6f8e6b-3be1-4bee-bb40-f6810b90f30d.png">
