Category feature with Title colors!
You can make categorised lists with title colors.
When you creat a reminder, select a title color.
E.g. You always select pink for somebody’s birthday.
On the list screen, press search button 
then select Pink
Now the list shows only birthdays.
Add Category Names
Go to
Settings > Presets > Category names
You can add Category names to colors.
It will show on the color picker!
Hide a color from the list
Also if you want to hide tasks with a specific color from the list, you can do that. Check the link below.