Brighten the image and it will have more impact. The snow should be white - not dark gray. And increase the saturation in the yellow so that it doesn't get blown. You may need to mask the sky as you lighten the picture because the dark blue looks nice, but even it could be a bit brighter.
Really beautiful combination of colors and a nice job with the composition. Since the snow is kind of gray, this image might benefit from an increase in brightness and maybe contrast. Still, this is a very nice, simple image with excellent graphic impact.
THIS suits the challenge. It's not a bunch of things that are colorful, but one. I love the complementary colors. I might saturate the yellow further or maybe that was your intent for the sky to be the burst!! Well, anyway, I like it.