Widget Variations allow you to individually style a widget. Choose any available variation at Appearance → Widgets → Widget Settings
There are 28 variations: box1-4, title1-7, icon1-3 (box2 only); nomargintop, nomarginbottom, nomarginright, nomarginleft, nopaddingtop, nopaddingbottom, nopaddingright and nopaddingleft; flush, flushtop and flushbottom; plus standardcase, uppercase and lowercase.
Note: You can compound multiple variations together such as box1 nomarginleft standardcase flushbottom.