Hello Brenda, All colors will fade from the sun, and turns out red does fade the fastest out of all colors. With saying that I would expect a difference of around 10% shorter lifespan for red, and with a 10 year warranty fabric I wouldn't compromise my choice of color for a slightly shorter lifespan.
I can tell you that they use very high grade materials. As to what colors may fade would be a good question for them.
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