Why are union suits red?

Union suits are often red because the color was practical for workwear in the 19th century, as it helped hide stains and dirt. Additionally, red dye was relatively inexpensive and widely available at the time. The bright color became associated with the garment, contributing to its distinctive identity as a functional, warm undergarment. Over time, this led to the red union suit becoming a nostalgic and iconic symbol of vintage American clothing.