Mark, I think that there are probably three sets of customers relative to color being important:
1) Folks who really don't care and see no value at all for this attribute. They want the product for what it does, rather than for cosmetic appearance
2) Folks who would enjoy a matching color, but will not pay more than a minimal premium for it as functionality, again, is the prime reason for their purchase
3) Folks who are very **** about color matching and will go out of their way to have a specific appearance to their implements, even to the extent to choose a more expensive option or wait for delivery
I personally fit into the second catagory. I happen to be a pretty **** person when it comes to these things, but also recognize and place limits on what I'm willing to pay or endure to satisfy my inclinations. I'd pay a few dollars more, but not a lot. I'd wait a short time, but not a lot. And, of course, they do make paint in a variety of colors...<G>
Some equipment manufacturers recognize the marketing value of color choice; Midwest, for example. And dealers of a particular brand of tractor would probably stock a given implement in a matching color if it is available...there is that "made for my tractor" showroom appeal. But even dealers would need to weigh any cost/availability factors in that decision, as I suspect you are doing based on your original post.