Nothing against Spillyjane - she writes wonderful mitten patterns, but I'm happy to take her work and rearrange it to suit my own likes. So her pattern became my pattern, and the progress shots are here:
The green Koigu is just slightly tonal, and the pink cashmere pops perfectly against it. The bonus to the colourwork is that there are somewhat longish floats of the pink cashmere, meaning that's what is felt for the most part against the hand while wearing the mitten.
Good thing I adore my Mom - otherwise, I'd be hard pressed to give these up.