Your logo(s) are used throughout your brands print & digital designs. The more logos that you upload, the more design variations that you'll be able to preview. If you don't have a logo, you may try our free Font Logo Creator.
When uploading a logo variation, you'll be prompted to select the background color(s) that it may look good with. The colors that you'll be able to choose from include your selected brand colors, and white. This information is used by Brandsynth to determine the different branded designs that a specific logo may look good on.