Paint chips are only approximations of the actual color. Most color fan decks will have this written as a warning on the back of the swatch. We recommend getting color draw downs and testing the rwal paint onto the surfaces to be painted. The small cost associated with color samples and testing are a wise investment. You will be living with your choice.
We recommend using two web based color tools to help visualize color choices:
The Benjamin Moore color viewer
The Sherwin Williams color visualizer
test house paint colors
