Garland blue lagoon is only theme that'll work with color module enabled
I just started using Drupal a few weeks ago; and I got it set up on my (localhost) machine, I'm using linux fedora 7 with lighttpd and mysql 5; and I got lots figured out, modules installed, articles written, etc. and decided to use the austere theme. I changed the color to green; though almost any color except the 'girly pink' would work.
After all that, I uploaded to my web host server (my default folder is called 'wwwroot' -- which still has my index.html as the 'active' page but I'm probably going to change that before the night is out to index.php) I did run 'install.php' before uploading the module and theme files. My hosting company is using IIS 6 according to my status report, php 5.2.10; mysql 5.0.27 and I'm using the latest and greatest version of Drupal (6.13) The image (gd) toolkit is installed -- I'm having some issues with image module directories, but that's another topic. I also had to re-create all of my content from my local machine, but at least I had it all figured out there so it wasn't too awful.
When I try to select another theme besides garland, blue lagoon (default), my theme goes away and I'm left with text on a white page. After researching on here, I tried a couple things and then un-enabled the color module, and happy days -- then I could select and see another theme! But, I'd like to use the austere theme in almost any color except the girly pink (default), preferably forest green I think; but without the color module enabled of course I can't change it. I've tried configuring it to that color when the color module was enabled; and then lost any theme. Same with trying to color garland -- it said that the file had been created but the theme went away.
So I now have the 'sky' theme enabled, because I prefer that to the default garland blue lagoon; but then I have to reconfigure the placement of the blocks I've created. I may go back to blue lagoon for now. I checked the austere module folder and sub-folder content on both locations, they're identical. Same files, same file sizes, etc. So now I'm stumped.... it works on my local machine but not my web host machine.
Any ideas? Or do I have to call this a color module bug and wait for an update? In case it matters, my website is: http://www.eft-sw.com (you may need to add the /index.php to see the drupal configured page).
This is my first post, please be gentle.

I'm not the best to answer this, but..
I really don't know the first thing when it comes to the color module because I've never once used it, but I do know that the reason I don't use it is because it didn't work for the themes I was interested in. I believe the theme needs to specifically be coded differently if the color module is to work, and therefore a good number of themes just said "whatever, screw the color module". Maybe there's also the added bonus that the color module is buggy, but I think a big part of it is just all the extra effort that goes into designing a theme that's compatible with the color module.
And really, for most people the color module is pretty pointless, since a designer usually knows what color scheme they want in advance and therefore won't need to repeatedly change it from time to time. In your situation though (someone who wants 1 particular color scheme that would be provided by the color module, rather than someone who just wants to sporadically change the colors at their fancy), I can see why the color module would be important.
Ultimately, I guess I don't know what to tell you, other than just go into your css and change the colors as you see fit. It's not the quickest/easiest strategy, but at least it's possible.
I think the problem is .htaccess in /files directory
After doing some more searching and experimenting (thankfully my site isn't very busy...) I think the issue with the themes / color module as well as issues I was having with images are related.
After I changed the theme to teal-top color garland, I clicked on my home page and used the 'view source' in my browser and saw it was pointing to a css file in a folder in the /sites/default/files/color/garland(nnn) directory, whereas with the default garland theme it's looking at the /themes/garland folder. Whenever anything gets written to the /files directory (where /images is also) -- it creates an .htaccess file which IIS doesn't like and then it won't read from that directory. I added an tag to my pictures instead of using the image module and then the picture still wasn't showing up -- that's when I discovered this issue and when I deleted the .htaccess the picture showed up AND my teal-top garland theme sort of showed up.
I found another topic that discussed taking the color-scheme created folder and moving it to the themes folder so it'll show up as a theme rather than being under the /files/color directory and I'm going to try that... or I'll try to figure out the .htaccess issue. If all else fails I'll try revisions to the css but I'd prefer to get a better handle on that topic before I do that...
Thanks for the reply -- thought I'd throw out an update.