All hardwoods will fade to a soft silver gray over time, depending on the amount of exposure this could take years or a few months. This is the natural patina that occurs with all hardwoods and their exposure to sunlight. Some like the weathered look, and some like to keep the original color. You have the option of sealing your hardwoods with a product like Cabot Hardwood Timber Oil which is available in several color tints (Ipe Flame). This will darken or enrich the color of your deck. Cabot Timber Oil must be wiped on and wiped off quickly before it sets. Do not apply in sunlight. Ipe may take 2-3 applications before the Timber oil will settle in. Oil applications are easy and do not require brushing on but rather wiping with a soaked rag. Oil penetrating sealers work like a stain and can be applied liberally over the surface. Use a clean rag to wipe the excess and let dry. This process can be done once or multiple times per year to maintain the beautiful color of the wood.