Added:
A Handler was added (load_post) to Re-register the Message Bus after a file was Open while Blender was already running.
The Bug was: If you were in a Blender section and then opened other file on 'Open Recent', 'Open' or even create a New file, the colors would stop to be automatically updated.
Solution: When a file is open in the current Blender section, the handler register the Message Bus again, then things work as expected.
'pycache' folder removed from the zip file.
Addon preferences now correctly defined as 'packege' instead 'name'.
Now the update is made vis Message Bus instead Handles as previously.
Panel was moved from K-Tools to View in the N-Panel.
Custom Colors now support Alpha.
Grease Pencil now supported properly.
Changes are saved Globally for new Blender Scenes.
1.0.0: A set of 7 colors in the N-Panel in the K-Tools Category. The colors are saved by scene (blend file), for future releases I can make it global parameters to all new blend files have the same colors set.