Aha, now I think I better understand what you mean. When coloring posts in the way you have in mind, then, to find the parent comment, one would look at the com

Aha, now I think I better understand what you mean. When coloring posts in the way you have in mind, then, to find the parent comment, one would look at the comments above, for a comment in a certain color? Then one won't need to rely so much on the indentation depth. Hmm that's an interesting idea. I'm a bit worried the resulting page would make use of too many colors — maybe a grayscale and patterns would be better (like you mentioned). One would, however, still need to click-and-jump, or scroll-manually, to find the parent, if one needs to reread it, and it's not on screen. I think the colors would mainly be useful on large screens, where one sees the parent comment without scrolling. On mobiles, I think click-to-jump-to-the-parent is more user friendly (rather than scrolling-scrolling-scrolling and scanning for a certain color).