css glow effect
div { width: 150px; height: 150px; background-color: #fff; box-shadow: 120px 80px 40px 20px #0ff; /* in order: x offset, y offset, blur size, spread size, color */ /* blur size and spread size are optional (they default to 0) */ }
Source: codersblock.com
html fill glow
fill: #0fa4e9;