How can I adapt the Appearance

Summary:

Hello,

how is it possible to change the background for quick actions/apps?

Is it possible to change the image for connections? Currently it is an Oracle design

For personal data there are two different shades of blue, is it possible to set them to the same colour?

The task bar is white, is it possible ti change to another colour?

Thanks a lot for your help.

Content (please ensure you mask any confidential information):

Grey background I want to change to blue

Connections (redwood) - other color? How?

two different shades of blue under Personal Info- want to change to the same color