I know a lot of people when styling like to match things exactly. Brown belt, brown shoes, brown accessories. That is completely fine, however it can get quite boring quickly. If you are looking for a way to bring a little more pop to an outfit try playing with colors.
Find a color wheel. I like to play with complimentary colors. They have the strongest contrast and when combined cancel each other out. Here you see yellow and blue. I love these two colors together they are cute as pieces or if you had an all blue outfit ( Blue top, blue jeans) you could use contrasting yellow accessories.
Play with color, see what colors YOU think work with each other. There are no real rules in fashion. Fashion is a way to express how YOU are feeling. If you wanted to wear a yellow dress and purple heels style it and rock it!
Other ways of playing with color: