Steal It: Skinny jeans in brights are a great look. J Brand does a bright blue version that is being worn by celebrities like Kim Kardashian. You can co-op this look for less by choosing Gap's trend-friendly colored denim (Buy Direct) that costs about half as much like the green jeans in the photo.
You can wear bright denim several ways: either wear it colorblocked (one color top, say yellow, with another color bottom, like blue and usually with a third accent color, like red in shoes) or tonally (head-to-toe all the same color. Or you pair brights with a neutral like black or white.
More ideas for colorblocking.