...If I really think about it, my closet isn't normally a plethora of color but mostly colors I feel I look good in....
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It sounds like subconsciously (or with regular & reliable feedback) were already dressing well with your colors. Some folks do that, and the palettes help round out some accent options or reference for the 'new' retail-season's colors.
You've probably already discovered that some retail-seasons, there is little to buy color-wise that you don't already own in a flattering cut. I've discovered that some years - about every other to 2 years apart - I kinda over-buy when it's a fit AND color that's flattering - because I'll be out of luck for the next retail-season or two.
Like this winter - the hot colors are various oranges, orangy-browns, mustard yellow, turquoise (the tone & clarity really tosses it into the different Seasonal groups), and berrys. As a "light Spring" - who might actually be a soft Summer - there won't be a lot for this winter, I'll be looking to buy - the first batch are just hideous on me, and Turq & Berry are tricky. But that's OK, cuz last winter I went a tad overboard, so I'll just shop my closet instead!
It won't be the "current" fashion, but if "current" = unflattering on the individual, is it really fashionable?