There is a setting in the plugin which allows you to do just that. You can also override this setting using the shortcode and or with CSS can also do the trick.
I find out that if ‘custom text’ option is false, default themes accent color is used for the floating text.
I want to show a post category so i cant use ‘custom text’ option and I cant use the Theme Accent Color either so I need to change the color. I will try editing CSS.
Ah my apologies, you are correct. I will add this new option with the next update, it should be done within the next week or so. CSS would work for the time being. I appreciate your patience.