This is bdthemes shortcodes ultimate (joomla) Icon example. you can get facility in this shortcode item> Icon(select icon from icon picker), Background Color, Color, Size, Radius, Shape Size, Border, Margin, URL, Class.just simply use this shortcode and get Icon Style.
Note: you can use this shortcode article and custom module. for your help we give a example bellow >

Simple Square Icon Style

[icon icon="icon: heart" background="#2c3e50" color="#FFF" size="32" shape_size="20" radius="0"]

Social Share Semi Rounded Look Icon Style

[icon icon="icon: facebook" background="transparent" color="#34495e" size="20" shape_size="15" radius="4" border="4px solid #34495e" url="#"]

Social Share Rounded Look Icon Style

[icon icon="icon: twitter" background="transparent" color="#1abc9c" size="28" shape_size="8" radius="256" url="#" border="3px solid #1abc9c"]

Icon Template Style

[icon icon="icon: twitter" background="#FAFAFA" color="#444" size="32" shape_size="20" border="3px solid #444" radius="0" class="template-style"]