Ooh, that's painful! If anyone pulled that on me they'd be pulling knitting needles from random body parts. Thankfully my mother also had pretty good taste when it came to 70s yarn colours. What strikes me now is what terrible quality that yarn was, though, no matter the colour. It was the same in the 80s; a lot of the acrylic yarn was so plastic it almost squeaked. Acrylic yarn has come a long way since then, but I still find it uncomfortable to work with, which is one of the reasons I'm a yarn snob. My main complaint with black-bordered afghans is that the colours are so vivid against the black background they make my eyes hurt (visuals are one of my sensory quirks). I made a baby blanket a few years ago with an oatmeal-coloured main border/background colour, and I loved the result. I was able to use strong, bold colours for the rest of the pattern, and the background colour softened them up.