Combining colour into a working outfit should not be difficult.
Firstly you need to pick one highlight colour that suits you like pink, red, blue or yellow. Then choose the base colour or matching colour that you will work with such as black, navy or brown (this could be a suit separate or a dress).
Here I have chosen pink as the highlight colour and navy as the base colour. You can always add white or black as neutrals if you need to (see the white shirts and skirt I have added).