Calendar Event Color Code | Communifire Support

Hello - When a user add/edit an event and does not select any color (as color is optional) (https://my.axerosolutions.com/spaces/5/communifire-documentation/wiki/view/21478/create-event). When we run the api call "/api/events" it always returns the last color  "Color Code - 11"  

I have the following 3 questions

1. is there any way to find out if the user did not select any color so that we can display a default color ?

2. is there any way to find mapping of color codes with actual hex colors ?

3. is there any way to add more colors to the list ?

Thanks