Custom Styles a color #000000 menu header

Hi I'm trying to customize change the color to --header-colored-control-color:#000000; only from my forum menus only at the top

Does anyone know how to do this I just want to change the menu color --header-colored-control-color:#000000; ?

Change by custom styles https://ibb.co/6FqVr2P

Leave the menu black in Day Mode Night Mode https://ibb.co/Tc0s5nL

solved is like this
:root{--header-colored-color:#000;--header-colored-control-color:#000;}