Go to Edit My Profile where there is the style template list, choose your fave one and go to
https://www.ubbdev.com/ubb/css/STYLENAME.css for example if your favorite style template is Khaki, go to
https://ubbdev.com/ubb/css/khaki.css Then "body" includes TextColor, FontFace and BGColor, "darktable" is AltColumnColor2, "lighttable" is AltColumnColor1, "tableborders" is "BorderColor", "time" is "TimeColor", "tdheader" is "TableColorStrip" and "TableStripTextColor", "categoryheader" is "CategoryStripColor" and "CategoryStripTextColor", "copyright" is "CopyrightColor"... did I forget anything?