You might need to post a screen shot.
Ok, here's a screenshot. Also, the location and rotations for the head bone are showing as red; I don't know why.
That is just the display. It is set to 'Show Group Colours'
Click View > Uncheck that option
I don't like it either - too overpowering and distracting.
(you can do the same thing in the Dopesheet/action editor.
Ah ha! I thought something was wrong! Now I've unchecked 'Show Group Colours' it looks far less alarming. Thanks.