Depending on the type of material you choose and what you are covering the color of your canvas can have a large effect on the lifeline. Think your application through thoroughly!
Imagine this, you are a boat covered in black on the hottest day you can remember living through in the state of Minnesota. Back story, you spent a perfect day on the boat with friends and family the day prior. You had so much wet fun that you covered your boat and went inside without a thought. Today, your boat sits in the dead humid Minnesota heat. Sun beats on your cover.
What do you think happens here? The trapped moisture under the black cover allows for a mold and mildew to grow a great deal more than choosing a lighter colored cover.
How about this, colors outside of your basics beige, ivory, black, and other colors without a real pigment will last longer in lifeline because the cover will not be broken down in the direct sunlight. Maybe you picked, red, because we all know matching influences a decision - understand that the red that matched today may not match three-years from now.
All materials are different and so much technology is built behind fabric applications today, don't forget to ask the necessary questions to understand exactly what you are getting from a custom covering.