If you don't have Stampin' Up colours just use the closest shades you have, dark brown, kraft and mustard yellow, I guess.
I am making Thank You cards for my colleagues at work. We finish tomorrow, so just squeezed this one in in time. The stamp is the amazing Swallowtail, I love stamping this one over the edge (to be honest it's difficult not to!)and the punched shapes and mat are from Summer Starfruit cs. The sentiment comes from the set Perfectly Preserved.