When we show our PowerPoint presentation to the audience we wanna catch people's attention, right? Do you remember the well known fact that around 70% of the information people apprehend visually? That's why colors have a big impact on understanding the information by your audience. It is very important to choose the right color or a combination since every color has its meaning. Below you'll find a few suggestions on selecting a color for your presentation depending on its purpose.
If you wish to inspire your audience for actions orange or red is a good choice.