customize text color shortcut options in toolbar?

Hello,

Please, is there a way to customize the five shortcut colors above the text color grid which drops down from the toolbar? (See attached screenshot)

I’d like to change the current black/red/green/blue/grey selection to match my whiteboard markers.

If not, can you recommend an alternate solution to have five text colors quickly available as I type?

Thank you!
Color Bar Question screenshot.png