To achieve a matching background color to that of your logo, e.g. a logo that is a square and has a black background color that needs to be placed on 2″ x 3.5″ business card template, please do the following:
Open your logo in your design program (likely Adobe Illustrator or Photoshop). With the Eyedrop tool, click on the background color of your logo – in this case it will be black per the example above. Write down the CMYK percentages of the black that you just sampled.
One example would be C=0, M=0, Y=0, K=100. (Standard 100% Black) Another example would be C=40, M=30, Y=30, K=100. (Four-Color Rich Black)
Once you’re in the Advanced Designer software, and prior to placing your logo, fill in the background color using the percentages you wrote down which are those of your background logo. This will ensure that there won’t be two different shades of black when your cards are printed.
This method is the same for other colors as well.