I made a list to help you in your task. Color in advertising is used to attract attention, build brand identity,gives some realms. You get better results with full color picture than black and white. Some things just do not look right black and white. To reflect the content you need colors.
Pastels are friendly and soft.
Greens and blues are calm and reflective. Color association can be a part of branding. Proper layout will communicate your visual concept to your potential clients. Make few sketches to develop the concept and position the elements. If you would like to receive more information about banner maker services please provide your name and mailing address.