For example, this article says “D is the highest value, 2 is the lowest. D is high. 2 is low. That's a wide range, but not completely wide. So our color has moderate saturation, thus making it a washed color.”
But you can make a wide variety of colors where 34/255 is the lowest sRGB coordinate and 221/255 is the highest sRGB coordinate, including some which are extremely intense (e.g. #d2d) and others which are more moderate (e.g. #da2).
The article says, “the values are both high and low, so it has middle lightness,” again based on the example #d92. But try comparing the lightness of #92d and #9d2. While HSL or HSV “L” or “V” will be the same between the two, one is a light yellowish green color, the other is dark purple.
These heuristics are grossly misleading and should not be relied on.
Due to childhood hours spent programming the TI-99/4A I can look at hex numbers and see bitmaps which is also not a particularly useful skill but trivial with a little practice. (unlike what they said in the Matrix, I doubt anyone would ever prefer it that way though)