I love to use tools from Code Junction, you must checkout https://codejn.com/tool/box-shadow-generator box-shadow: 0px 0px 0px 3px #000000;/* Sample code to generate a box shadow */ .box { box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.5); }box-shadow: [horizontal offset] [vertical offset] [blur radius] [spread radius] [color];