Pre-KEP Request for Input: Storage of categories & colors

Georg C. F. Greve greve at
Tue Jun 7 16:48:38 CEST 2011

Hi Shawn,

Thanks a lot for sharing how Outlook handles this!

On Tuesday 31 May 2011 21.36:25 Shawn Walker wrote:
> There are two parts to how Outlook handle Categories and Colors.  Outlook
> has 21 defined colors that the user can assign to each category.  One of
> the color can be "None" to assign no colors to a category.  The user
> cannot modify the colors.

Do you know whether that list is available anywhere? It might be worth 
consideration to have Outlook, Kontact & the web use the same colors by 

> Outlook uses a multi-string value to store categories names to support
> multiple categories for a single object.

Are there any limits on the characters allowed in those strings?

> The KEP should defined that the category to allow a multi-value string with
> a HTML Hex color for each category, if there isn't a color for a category,
> then that category will have "no color" assigned to the category.  Since
> Outlook allow multiple category names, I suggest that we allow multiple
> xml metadata.

Sounds reasonable.

One question that I still have in my mind: Where do we store this? Which 
object type should carry this kind of information? In which folder? 

Any ideas? suggestions?

Best regards,

Georg C. F. Greve
Chief Executive Officer

Kolab Systems AG
Zürich, Switzerland

e: greve at
t: +41 78 904 43 33

pgp: 86574ACA Georg C. F. Greve
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