Location

Panel
3D Viewport ‣ Header

Actions

Key
Toggles AutoKeying, changing the colors of the interface depending on the addon settings. Note that this is not the same as the ‘Auto Keying’ button in the Timeline, that button acts as normal

Settings

Selection
When true, the color outlining the active object or pose bone will be changed depending on the state of Auto Keying

Select on/off
The color to set the active object/bone to: the color on the left is the default color when Auto Keying is off; the right is the color when it is on.

Playhead
When true, the color of the playhead in the Timeline, Action Editor and NLA  will be changed depending on the state of Auto Keying

Playhead on/off
The color to set the playhead to: the color on the left is the default color when Auto Keying is off; the right is the color when it is on.

Header
When true, the color of the header in the 3D viewport will be changed depending on the state of Auto Keying

Header on/off
The color to set the header to: the color on the left is the default color when Auto Keying is off; the right is the color when it is on.