Customize text color in Rise ?

Hello,

Is it possible de configure le color palet in Rise when we need to change de text color in a block ? 

It is "too long" to set up the right color by highlighting the text + entering the color code, each time !

How to set our own color palet ?
I think this option should be really helpful for many users also.

A workaround using block template could be used... but not sufficient.

Thank you,