Parameter change using Widget Blueprint

Can anybody help?

I can change and set (or randomize) color of chair but my goal is to get color from button. Or collection, but it would be still depending on number of slot.

I’m trying to get this number (variable BigIntSlot) from BP with interface (called ColorInterface) and using this number want to get color from collection…but if I could get slot number then I would also get slot color.

Hope for your help again :slight_smile: