I am, as you can tell from reading through my blog, a very big fan of the Peacefleece yarn, the Peacefleece people, and the Peacefleece business ethos.
I binge ordered every single color of their DK weight yarn in February. I attribute this to 2014 being the longest, coldest, most color deprived winter since I returned to Maine in 2007. It was beyond my ability to self regulate. Fortunately since I am "in business" I can look at it as a wise inventory investment rather than the impulsive response to color deprivation that it actually was. Also, my birthday is in February. So there's that....
The colors in this Mitt are Sheplova, Father's Grey, Antarctica White, and Blue Jay.
In the mitt directly to the left it is a little less clear cut. The light is white, the dark is Olive Roots, the bright is Blue Jay and the contrasting is....Violet? Which is really not that contrasting but it worked. So that is why I give you a Recommendation rather than a Rule. I would just purchase 4 colors that you really, really like. Four of Peacefleece's 4 oz skeins will give you enough to make many, many mitts and you can mix the colors around every which way.
You'll need needles (I made these with double points) in size 1-3 depending on your knitting style...I knit loosely so I used 1s.