Hmm, I see what you mean. I usually search by either design, ie "florals", "stripes", "border prints", "lilacs"; and by color, "blue", "red", etc. I may search for a particular shade, like "malachite" or "emerald", but I haven't had as much success with those as with the generic "green". So, where would I search for "coral" or "salmon"? In orange? Pink? I guess if I'm looking for a particular shade and the search doesn't bring up that description, I'm going to scroll through all the related colors to see what I find.
I have found on e-bay that if I want a particular shade, there is a box to check to search descriptions as well as titles. That does help. So if I were to search for a black print, and check "search descriptions", everything that has a significant amount of black in the description would pop up. Does that make sense? I've just finished a 12 hour night shift and am tired, so it may not! LOL