it is gradient so you must select the color from the top to get the rgb.. Scroll down until you see something like: <style resid=taskpane> element [id=atom(sectionlist)] { background: gradient(argb(0,196,200,212), argb(0,177,179,200), 1); padding: rect(12rp,12rp,12rp,12rp); borderthickness: rect(1,0,0,1); bordercolor: white; } argb(0,196,200,212) is the rgb at the top and argb(0,177,179,200), 1) is the color att the bottom of the taskpane