Debutify Theme - Change Button Color

[TradeMark21]

I want to change the color of my discount code button on my order summary page. The thing is, is that there's another button on the same page but I don't wanna change that color. The one that says black, I want black and the one that says same I want to keep the same color. Would it be possible?

 

 

[ZestardTech]

Hello There,

Please share your store URL.
So that I will check and let you know the exact solution here.