Why can't any browser apply this color rgb rule?HTML\[code\]...<header> <h1>Header</h1></header>...\[/code\]CSS\[code\]header h1 { background-color: red; color: rgb (224, 226, 213);}\[/code\]Chrome Web Developer tools is telling me that it's a invalid property value, but I can't understand why. You can see the result in JSFiddle.