Here things get a bit tricky because the order changed when I wrapped it around the bottle. The captions under the pictures are right, so just follow those.
The closest in tone was Lone Star, which I honestly expected. They're similar colors, but Muggins is definitely purple where Lone Star is blue. But Muggins is blue-toned enough to keep it close.
The closest color-wise were the three in the middle. Delphinium, and Rumple's Wiggin'. Delphinium is definitely a smidge darker than the other two, but it has the same blue-ness of Muggins. Rumple's Wiggin' is pinker, but the same lightness as Muggins.
Overall, I think this is a good addition. It's a beautiful pale, blue-toned purple, which I apparently don't have. But I do have a lot of other purples that I need to wear, so on to that.