email – Need a “keyboard shortcut” to change selected text’s “text color” in Gmail replies

I use the GMail web interface, in Firefox, for all my email needs.

I frequently change the color of text that I quoted from the Sender in my GMail replies.



          You wrote, “. . . a;sdkfjasl;fkjasl;kfj . . . ,”

          and I just want to say that I agree totally.

I’m having to select the Sender’s text and then mouse & click to change its color 
and this is tedious.

I need a keyboard shortcut to change selected text to, say, black, from my default 
color of blue.