What is important in oversized bench/window seat cushions?
First, you will need to take a look around to determine conditions in the area – sun, shade, moisture.
For sunny areas we recommend darker colors of solid or texture Sunbrella; for shady places, better to go towards bright colors.
You want to select color which compliments your area but not drawing too much attention to it from the rest of the decor.
Use throw pillows to add an accent to your cushion.