You can change that in inc_activeusers.asp.
Look for this block of code (around line 126-130):
" <td bgcolor=""" & strTableBorderColor & """>" & vbNewline & _
" <table border=0 width=""100%"" cellspacing=1 cellpadding=4>" & VBNewLine & _
" <tr>" & VBNewLine & _
" <td bgcolor=""" & strHeadCellColor & """ colspan=""" & sGetColspan(7,6) & """ align=""center"">" & VBNewLine & _
" <font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """ color=""" & strCategoryFontColor & """><b>" & fLang(strLangMOD_Ls3kAU_00001) & "</b></font>" & VBNewLine & _
You should change the variable marked red to whichever color-variable you want to display.