How to change dress colour ?

Hey there, 

Welcome to the Lightroom Community. We need more details to help you figure this out. What version of Lightroom and operating system are you using? What image type are you using? Is it JPEG/RAW or any other image? Which tool or feature are you using in Lightroom? Would you mind sharing the video recording of what you are doing and what you want to achieve? 

Thanks, 

Shivani