Color palettes vary from website to website but the most important thing to remember is that your call to action buttons should have a healthy contrast from the background of your website. If they do, you will likely see your buttons being clicked far more, which will increase your leads and sales.
Color Theory and Landing Page Buttons - Adpearance
The Impact of Color on Calls to Action and Conversions - FasterCapital
The Impact of Color on Calls to Action and Conversions - FasterCapital
Call-to-Action Buttons - 6 Advice for Color Guide on it
15 Ecommerce CTA Examples and How To Write One (2024) - Shopify
The Art of Creating Effective Calls to Action - Invesp
Call-to-action buttons - what are they, and how do they work? - PUSH.fm
Call to Action Marketing: The Best and Worst
Why You Shouldn't Use Your Brand Color on Buttons, by UX Movement