American Christians are being urged to wear the color orange – either on a ribbon or as part of their clothing – to focus attention on their brothers and sisters being killed for their faith around the world.

The color is a reference to the orange jumpsuits that Islamic State (ISIS) militants have forced beheading victims to wear.

Pastors such as the Rev. Frank Karwacki of Our Lady of Mount Carmel Catholic Church in Mount Carmel, Pennsylvania, are urging church members to wear orange to church, or even every day.

“We are all brothers and sisters in Christ,” Karwacki told FoxNews.com. “It’s so sad how they are being tortured — we need to get prayer power going.”