Learn CSS variables by building a skyline STEP 60

HTML-CSS
1

Can anyone provide any feedback on this one

.bb3 {
width: 10%;
height: 55%;
background-color: var(–building-color3);
background: repeating-linear-gradient(90deg,
var(–building-color3),
var(–building-color3),
var(–window-color3) 15%,
);
}

image

2

Delete the comma after the third color.