[design bug] PP colors hardcoded in other tenants

[dalibormrska]

Describe the bug

In the PK instance we use PP colors for some reason. Probably hard coded.

To Reproduce
Steps to reproduce the behaviour:

1. Go to 'https://community.projectkamp.com/'
2. Log in
3. Click on the notification icon while having now unread notifications
4. See the issue

Expected behaviour

Button - Main color of the instance (yellow for PP, green for PK, red for FF)
New notification border - Main color of the instance
New notification fill - 40% of the main color of the instance

[dalibormrska]

@mariojsnunes did I use the word tenant in the title correctly haha?

[dalibormrska]

We decided to actually not keep this one open now, it would be a bigger box to open properly.