The mark consists of it's KeepUs text all together in black color - in a source sans font, and then there's the gradient color mixture of blue and purple colors which make up the tab image outline around white color text Postd in a source sans font.
The color(s) it's KeepUs text all together in black color and the gradient color mixture of blue and purple colors which make up the tab image outline around white color text Postd is/are claimed as a feature of the mark.