Store Notice color

Hello, I'm using Catch Box Pro, I done most of my customization, but one issue I have is the Woocommerce "store Notice" background color doesn't go well with the regular background color I've setup.  All update have been done, I've look thru all options of "Appearance/Customize/color" and didn't see the option for that topic.  When I click "Additionnal CSS", it send me back to my Dashboard menu.  The only left is the Theme File editor, I presumed.  But where is hidding the html code line for the (some call's it demo) store notification background color so I can put in my own color code ? Many thanks and warm regards... Philippe