Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy . You may unsubscribe at any time. A pleasant swim at the beach or pool can quickly turn deadly. Every year, over 4,000 people die from unintentional drowning across the United States.  Swim safety experts say drowning is highly preventable. They recommend learning basic swimming skills, designating “water watchers” to keep an eye on children in the water, and avoiding swimming alone or under the influence. But what if your outfit could stop you from drowning? Swim safety experts say wearing the right color on your next beach day is a good way to stay visible and out of harm’s way—especially for inexperienced swimmers and kids. So what are the safest swimsuit colors? Lisa Zarda, Executive Director of the U.S.…