In order to add colors to the Trades window and to the Trade ticker window, follow the instructions below:
Step 1: Click on the Settings menu (three dots to the upper right of your desktop), then click on Settings and then Open advanced Settings.
Step 2: Then click on User interface → General. Under “Content colors” you can change the “trade ticker coloring relative to” Hitter/taker.
Green shows when a buyer purchases at the Ask price, also called a taker.
Red shows when a seller sell their shares at the Bid price, also called a hitter.