Fiori Launchpad background color home screen

Hi experts,

I would like to set the background color of the Home Page in the FLP to the standard blue from the bluecrystal SAP Theme (light blue color).

I saw that in the FioriLaunchpad.html conig file, the theme is set to bluecrystal, but it appears with some dark blue color.

What is the easiest way to change it?

Should I create a custom theme with the UI Theme Designer?

Regards,

Georgi