I bought acrylic yarn by Stylecraft in various colours to make hats for Christmas gifts. I chose pink and blue for the first hat. I think it came out okay. I used single crochet throughout then picking up alternately the front and back stitches to make the rib. I will make a grey hat next. I don't usually use greys and browns then I saw the various colour shades and thought I'd like to try them together, a rich tonal effect!