Most people know the language of colors, understand it, or can explain it better than I can, so I'll be brief.
What we normally call 'color' refers to the hue, (red, yellow, green, etc., found on the color wheel), but there are two other parts, value (light/dark) and intensity (brightness) which also come into play; we didn't get to intensity, so we'll ignore it.
I love to weave what I call, "roughly monotone" textiles, mixing almost identical hues but with slightly different values, or textures. (Not sure if values relate to textures, so any help is appreciated.) I believe the weave visually comes to the fore this way.
What I find most attractive about Randy's textiles is when he mixes many hues, but within a relatively narrow range of values; so, many colors, but about the same lightness/darkness. This creates a shimmering, elegant effect that gives the textile a different kind of interest than my usual textile. Take a look.
The problem I've always had is I don't see values. I can distinguish black and white, but not the subtle differences of the shades of gray. I have 6-, 10- and 12-block gray scale things with little holes; I have the quilters' red and green plastic sheets; I have squinted and looked under the moonlight, but I just don't see it, and I'm happy when someone tells me A is darker than B. I'm value-blind rather than color-blind. So one of the goals Randy thought I should aim for is to experiment more with colors and develop alternative ways to understand value relationships, so I can weave cloth that shimmer.