The icon resemble a three dimensional square shape with curved corners and a hollow center that is also the same shape. The square has two horizontal lines running through the middle top and middle bottom of it.
This OpenStack icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 6,000 icons, all in the same style and quality.