OH 3 ui theme


I have been configuring a ui using the OH 3 pages and I really like the way it looks.
However I am not a big fan of the orange theming openhab defaults to.

Is there a way I can override the following css for all of my pages, without adding it on all of them?

:root {
  --f7-theme-color: #990000;
  --f7-theme-color-rgb: 153, 0, 0;
  --f7-theme-color-shade: #700000;
  --f7-theme-color-tint: #c20000;