In natural light, most colors appear three tones brighter. You can see how they will look against the brick at different times of day if you bring some home and hold them up to the wall.
Consider local pictures of houses built with red brick as examples. Look for high-end homes because they tend to be designed by top architects and designers. It's a good idea to look at the work of others for ideas if you don't have the funds to hire your own designer or are unsure of how to achieve the desired effect. A lot of pictures can be found on our website or elsewhere on the internet.