Layout: Use columns to arrange the content. 4 or 5 equal-width columns are recommended; some of the columns can be double-wide. Choose a layout that works best for your content (including text, charts, graphs, images, etc.)
Background: Use white or a subtle color/gradient. Don't make it compete with your content!
Make them stand out by using a larger font, bold type, and/or color boxes. Use separate text boxes for the headings so that they are easier to edit or format separately from the text in the sections themselves.
Use sans-serif fonts that are easy to read. Avoid novelty fonts or serif fonts. Use the same fonts and font sizes consistently for the same type of content. The below examples are just suggestions to help you get started:
We all love colors.... but, on a poster, colors cannot be distracting or cause the viewer reach for their sunglasses! For our college, you can incorporate the Springfield College color palette into your design, or pick your own color scheme.
A good suggestion is to use neutral colors complemented by bolder text boxes for titles and headings. If you have a particular color scheme that is associated with your topic, use that. If you have images with a certain color scheme, those colors could also be used as accent colors on the poster.
Make sure to use contrasting colors for the text and its background. Remember that simple is best. Use dark lettering on a white or light background. Avoid using white/light text on dark background for a large amount of text, as it is hard to read.
The content, headings, text, charts, and other graphics is important as well. Make everything line up, and at the same time let your content breathe. Don't be afraid to use blank space in between elements - it actually draws attention to your content and makes it easier for the viewer to follow your points.