What is the uniform color for Ku style-yang style Tai Chi?

The uniform color for Ku style/Yang style Tai Chi is black shirt and pants with black buttons. There are other colors for Tai Chi/Wushu uniforms, but those are other styles. Tai Chi is a style or type of Wushu. To tell you the truth, I really don't know what color the uniform is for Ku-style Tai Chi. I'm thinking it's Sky Blue or Light Blue, but I'm not really sure.