To answer Steve's (much) earlier question - the color information is no longer sequential if you use colorio to import an XML file with color information. 

Adding colors as needed is a standard approach that's less fiddly, but when things like a split between Adobe and Pantone happen, a bulk import of updated color definitions is needed. 

Some additional background on the Adobe / Pantone thing is included at the bottom of this idea (adding support for defining color using newer models)
community.rws.com/.../add-support-for-defining-color-using-newer-models-in-the-xpp-colorspec

How are you getting this file to be out of sort? For me, when I add new colors they sort into their correct place. Are you creating this file in ASCII or importing in XML with the numbers out of order? I can see where it would not sort properly. But if the file is already sorted, I cant create an out of order one through the UI.

Actually if adding "sorting" to one column then presumably it could be added to all the columns relatively simply. I agree Mark's answer is a "user defined" fiddle but it should be in the core product - who adds a number (the primary field) and sees it placed non-numerically.

Yes I can see that this becomes a problem over time.
It should not be a big problem for engineering to add a 'sort numerically' entry in the interface to rearrange your color spec.
And while we are there why not add the possibility to sort alphabetically based on the color names - this would make it easier to find a particular color.
Or what about a 'find color' entry that allows you to search for a particular (partially) color name?

At first I was like Mark and thought well the color spec file is ascii, how hard is it to write a script that does that for you.
But at second thoughts I think this really should be integrated in the interface.

I have some Perl that will take the color spec, and find 'holes' or gaps in the sequencing. It wouldn't take more than a few lines of additional code to sort numerically by color number and/or by color name.  And export it to a new spec file of course ;)     Let me know if this is of interest and I'll dig it up and post here.