While the indoor/outdoor carpet options frequently found in hardware stores are durable and inexpensive, they are often plain-looking and don't offer many decorating or design options. However, you it is possible to improve the appearance of indoor/outdoor carpets with paint.
Step 1
Place newspaper or plastic around the perimeter of the carpet to protect the surrounding floor.
Step 2
Lay down masking tape on the carpet to mark out the design that you want.
Step 3
Paint the carpet using a paint roller that can fit in between whatever tape lines you've laid down. Start in the center of the carpet and work your way to the outside. Use a paint that is designed for outdoor applications, as it will be more durable. There are cloth paints available at craft stores as well.
Step 4
Allow the paint to dry and then lift off the masking tape.