This component is using the fantastic Font Awesome icon font, a project by Dave Gandy. Altogether Font Awesome provides more than 300 symbols and glyphs for web-related actions. Icon fonts are great, because they enable you to easily change color, size and more via CSS. They are scalable vector graphics, which means that they look great on high-resolution displays. To apply this component, add any .uk-icon-* class to an <,i>, or <,span>, element. Et voilà, you have a vector icon, which inherits size and color just like your text does. This example shows a button which is split into a standard action to the left and a dropdown toggle on the right, using the Dropdown component. This example shows a blockquote from the Base component with a large quote icon. It also uses the .uk-align-left class from the Utility component. The <,blockquote>, element defines a long quotation which also creates a new block by inserting white space before and after the blockquote element. Use the modifier .uk-icon-hover class to use an anchor as an icon, applying a hover effect and removing the link underline. Use the modifier .uk-icon-button class to create an icon button, which can be used perfectly for social icons. To add a fixed width to the icon and center it, add the .uk-icon-justify class. This is useful when using different icons in a list. Source.