Many statuses are available in Rainbow. Your contacts' status provides information about their availability (presence). Statuses are rendered visible by a plain colored spot on your contacts' avatar. 
The table below presents these statuses and explains their impacts on Rainbow functionalities: 

Descriptions

Online
This status translates that your Rainbow contacts are connected to computers. With these contacts, you can:

 Send Messages or Share Files
Make an Audio/Video call
Make Phone call

Away
This status translates that your contacts are connected to Rainbow. Yet, they are not necessarily behind their computer. With these contacts, you can:

Send Messages or Share Files
Make an Audio/Video call
Make Phone call

Online on Mobile
This status translates that your contacts are only connected to Rainbow with Android or iOS. With these contacts, you can:

Send Messages or Share Files
Make an Audio/Video call
Make Phone call

Busy
This status translates that your contacts are already enrolled in a call with Rainbow. A specification about the type of communication (Audio, Video, or Screen sharing) is displayed. With these contacts, you can:

Send Messages or Share Files
Make Phone call
 Make an Audio/Video call

Do not disturb
This status translates that your contacts wish to block all Rainbow notifications.
With these contacts, you can:

Send Messages or Share Files
Make Phone call
Make an Audio/Video call

Invitation sent
This status is associated with the people you have added to your contact list, but they have not yet confirmed your contact request. With these contacts, you can:

Send Messages or Share Files
Make Phone call
Make an Audio/Video call

Invisible
This status translates that your contacts do not want to be reached on Rainbow. With these contacts, you can:

Send Messages or Share Files
Make Phone call
Make an Audio/Video call

Offline
This status translates that your contacts are disconnected from Rainbow. With these contacts, you can:

Send Messages or Share Files*
Make Phone call
Make an Audio/Video call

* Users read messages once they connect again, NOT earlier.