In Toledo, OH the American Association All-Star squad becomes the first team to experiment with uniforms designed to be worn during night games. The red, white and blue shiny satin uniforms are believed to reflect the light during the evening contests.

On July 14, 1938 In Toledo, OH the American Association All-Star squad becomes the first team to experiment with uniforms designed to be worn during night games. The red, white and blue shiny satin uniforms are believed to reflect the light during the evening contests.

Source
Baseball Reference July 14