Not to be a total wet blanket on this... but if the pen was running out of ink (I know it doesnt look like that) then that would be a plausible reason for the different colors. Happens to me all the time.
Yeah, pens run out of ink, when they do they usually start skipping first. The newspapers didn’t show it in color as to hide the difference. That’s called collusion.
McConnell needs to apologize and someone needs to go to jail.