If you're like me and wear pretty much the same thing everyday bought from thrift stores (excepting underwear), it can really open your eyes. Women do, generally speaking, all look better than men. I probably spend too much on outerware, but I save on clothes because I just don't care.
As an anecdote, one of the baristas at my coffee shop said a ski pass at our closest resort (I'm in the Rockies) was too expensive while wearing, what I thought to be, fancy clothes. After 9 months of interaction, I've concluded her clothes budget would cover 3 ski passes. My parents taught me to value experiences over material goods, and I'm very thankful for that.
But for online catalogs, the retailer doesn't control the color accuracy of the customer's computer or phone screen, so most of the time, the customer won't see the accurate colors anyway. So why bother?
Go to the Salvation Army sometime, where they often sort clothes by color, and you will particularly notice that almost everything red is made with the exact same dye.