The color of the birthday set in the account profile cannot be changed. If you wish to change the color to your liking, please follow these steps:
A) Hide your birthday from the calendar view from profile settings
- Go to the main menu by tapping the 3 horizontal lines in the top left corner of the screen
- Tap your account at the top of the screen
- Tap "Edit" in the top right-hand corner
- Set "Birthday Display" to [Hide]
B) Create a yearly repeating event on your birthday with the label color you wish to use.