Take, for example, one of my all-time favorite colors, Wedgwood Blue, (though this yarns is called Delft by my distributor). It's such a personable, restful, regal color, and yet in the context of this warp, it looks positively dirty and gray. (I admit, it's a mighty photogenic color and none of my pics show the blandness.)
And then the marine/teal thing, called Iris; it's so loud it's borderline obnoxious, and yet it produces amazing metallic look, both in this warp and in combination with my favorite gold. Sadly Iris has been discontinued.
And then there's the way colors change appearances. My pics don't do justice to reflect the startling differences in Scarf 1 from the right and the left; later when the sun was streaming in from the window behind me, the view from the right was almost white.
That's what I'm proposing to learn.