Importing Color Labels from Adobe Bridge to Digikam

Hi everyone,

I've been using Adobe Bridge for a long time to manage my library of 
photos and now I want to start using digikam.

The problem is that I don't know how to import the color labels that I 
assigned in Bridge to Digikam.

It seems that Digikam can read the metadata stored in the xmp sidecar 
files of my library including the "label" field.  The problem is that I 
customized the name of the labels in Bridge so Digikam cannot "read" 
them as colors (see the image):


To solve the problem I've tried different things with no results:

- Using a shell script in "batch queue manager" to replace my custom 
label names for the label names used by Digikam but didn't work.

- Filtering / searching the images with a specific label name to 
manually assign a new Color Label. The problem here is that Digikam does 
not allow me to search for labels with other names than the standard 
ones (Red, Green, Blue, etc)


Could you indicate me what can I do?

Thank you very much in advance.