Another anecdata - my cat growing up was orange, and he was plenty smart. He was very relaxed/chill but would come when called and was an excellent hunter of the house mice.
His mom was a very intelligent calico (she communicated with people impressively well), and his dad was an unknown feral cat, so I think his smart-cat genes were more noticeable than whatever correlates with orange.
His mom was a very intelligent calico (she communicated with people impressively well), and his dad was an unknown feral cat, so I think his smart-cat genes were more noticeable than whatever correlates with orange.