css - Why is linear-gradient invalid?

Question

background-color: linear-gradient(to bottom, #fc8291, #fa213b);

This line of code is invalid on Chrome and Firefox. No background color is displayed, but background-color: red; can display red normally. Why is this?

Answer 1

Syntax error: no -color

background: linear-gradient(to bottom, #fc8291, #fa213b);