we have a lot of clothing and shoes in our magento shop. We use layered navigation to allow the users to shop by color or brand. Everything works fine. However, there is multiple colors which are very similar (chesnut brown, dark brown, brown/black, etc) which should only appear as a single one (in this case just one entry for "brown").
Does anybody know of a plugin or at which part of the code one should tackle that problem? I have googled for hours, but coudln't find anything on that topic. It feels strange that we are the only ones who are interested in that kind of usability optimization. Any kind of hint is appreciated. Maybe we can figure something out together.
Side note: changing the original attributes and products to simpler/normalised versions is NOT an option due to internal/backend stuff.