changes not working

Hi, Im changing the font color of a word in the slideshow title of each slide, I’m using <span> to change it, But how come it’s not working? It’s working on the 2 first slide then the others are not. when I update the changes, it comes back to what it is before. Please help. Thanks!

https://ww.wp.xz.cn/plugins/slideshow-jquery-image-gallery/