ar33bshola CSS will help you!
.App-header .Button, .App-header .Button:hover /*icons in the header*/
{ color: #hex-code_of_the_color_you_want !important; }
.App-header, .App-header a /*name of the forum*/
{ color: #hex-code_of_the_color_you_want !important; }
If you want icons and name of the form same color, do this:
.App-header .Button, .App-header .Button:hover,
.App-header, .App-header a
{ color: #hex-code_of_the_color_you_want !important; }
❗This will change the colors in your light theme as well. So, my advice is to use universal colors, like light grey or white, that will look OK in both themes OR I there is also an option to use “var” instead of hex-codes. But is is more complicated to do if you do not know css well.
Hope you know where you should write you css-code… If not, let me know, I will show to you.