Interior design books will often suggest different colors for various rooms and moods – energizing red for a dining room to inspire dynamic conversation, yellow for a cheerful, relaxed kitchen. This same color theory should be implemented into your site design. Many marketers claim that certain button colors like green or red increase landing page conversions, but ultimately you want to focus on the contrast of the button color in relation to your background color. Paul Olyslager has a nice guide on CTA buttons worth checking out. Test various colors, placements, and sizes to see what works!
Prospecting and marketing are all the things you do to get people into the first of your sales funnel stages. Note that stages are broken into two or more steps wherever possible. A demo could be called a single stage, but in real life it involves a lot of things: contacting the customer, sending reminders, doing the demo, and then following up. Whatever your own sales stages look like, the support you need in managing them will be the same.