With a Ripl Pro subscription, you can choose 2 brand colors to help save time creating your post. Once you select your brand colors, most designs downloaded to the design tray on the "Customize" step will automatically appear with your brand colors selected.
To set you brand colors, tap the Ripl menu in the upper left corner of the home screen, then "Business Profile Settings." Under your logo, you should see "Brand Colors." Tapping the "+" button will allow you to pick your color with a color picker or you can enter a HEX #.
Business Profile Settings:
"Customize" step after selecting brand colors: