hi RIpenluft, what is your theme? there is a simple code that you can use, but the themes’ structure usually vary, so it’s nice if it’s a free one that I can check the structure to direct you properly
background-color is for the background color of the button, and ‘color’ is for the font color. You can use color names, but, if that doesn’t work, you can use hexcodes (if you’re not familiar, try googling hexcode red for example)
hi @rlpenluft , actually, I’m sorry, the error was mine. You have to insert card_product.selected_or_first_available_variant.available == false, and not card_product.selected_or_first_available_variant == false