CSS Text Stroke
CSS Text Stroke Generator. The -webkit-text-stroke CSS property specifies the width and color of strokes for text characters. This is a shorthand property for the longhand properties -webkit-text-stroke-width and -webkit-text-stroke-color.
Currently this text-stroke property is only supported on webkit based browser. so it will only work on Chrome or Safari, and you can only use it by prefixing the property with -webkit-.