The colors are so close in shade that I really did not think you could see a difference in them if I worked them alternately on one side.
I did want a thick potholder so came up with the idea of putting two together to make one. I think it worked out well. This yarn does not have much give to it so you may not like using it for this project. I was not thrilled with the feel of this yarn after using itbut feel the results were what I expected. If you look closely you can see the other color through the holes.
I have spent some time weaving in ends on the GC CAL afghan. But I am getting a bit tired of working on it as I feel I will never finish it. I will of course but it feels like it is growing more complex as time goes on and that I am not making much of a dent. So, I will take it in small doses for a while and work on other things I have going as well.