Here is a lovely look by the sweet Miss Silvia! I love the red and yellow worn with bits of white and warm rusty brown. One might not think they go too well together, but she definitely pulls it off. She also does something I love and do myself- match her stockings with her cardigan! This look is another one of her great red and yellow outfits.
Squeaky Kraken on flickr (whose blog is here) is wearing her yellow and red with a really awesome bow she made herself! It looks so sweet and prim from far away, but the bow is made of leather and the tartan skirt is a little punk, giving her look a perfect bit of edginess!
Alicia (on flickr as minicrush) wears a lot of black in her red and yellow outfit- but the red and yellow are far from being mere details. The black balances out the amazing yellow dress, and the solids of the rest of the outfit really let you see the plaid pattern of her red stockings. I have a similar pair myself; starting to regret selling a similar mustard shirt dress now!
Red and yellow are also great colours to transition from winter to spring, in my opinion. Red can be worn year round, and I think it's a nice bright colour that can perk up an outfit of winter neutrals. Yellow, a mustard yellow especially, also blends nicely with a lot of winter neutrals. Note how all of these outfits are worn with black, and/or brown. It also looks really nice with grey- I think a yellow and grey dress with red accessories would be downright stylish in any season, wouldn't you agree?