title: Typo3 8.7 Bootstrap_package 10.0.2 change footer background color
body: <p>how can I change the background color of my footer without changing the css?
  we run a multidomain site - for that reason we do not want to change the extension css. we found some constants and found, that changing $gray-900 is one possible solution. but $gray-900 is used in other context too - and it does not look like good solution ..</p>
  
  <p>my setup is:
  Typo3 8.7 Bootstrap_package 10.0.2</p>