How does color psychology apply to discount pop-up design?

As an e-commerce store owner, I'm struggling to create discount pop-ups that not only grab attention but also psychologically encourage visitors to take action. I understand color plays a crucial role in user perception and conversion, but I'm unsure how to strategically use color psychology in my pop-up design. I want to understand which colors trigger specific emotional responses, how they impact user trust and urgency, and how to design pop-ups that feel both inviting and compelling without seeming aggressive or spammy.