The color(s) green is/are claimed as a feature of the mark.
The mark consists of the literal logo, Fifteen, which is the product name. After the product name, there is a red apostrophe which indicates seconds. There is also a lens which is prominently displayed since the product is a video social networking app. There is on the bottom left-hand side a home icon. To the right of that, there is a heart icon. To the right of that, there is a user profile icon. To the right of that, there is a banana icon, and to the right of that there is a magnifying glass icon.