: Showroom fluorescent lighting differs significantly from your home's natural and artificial light. A "cool silver" in a store might look like a "warm gray" in your bedroom due to dye lot differences or your home's specific color temperature.
: You can actively test for stain resistance by spilling common liquids (like coffee) on the sample and attempting to clean it before committing to the full purchase. Where to Buy and Get Samples
Most retailers offer 8-inch by 8-inch swatches for around , often with free delivery. Carpet Pro Cleaners - Yelp