Change the color of the colorful band underneath the header?

Sorry, I am still a little confused. Where do I put the color css?

I put the css in my ‘custom-functions.php’ directory but I keep getting an error.

• This reply was modified 5 y, 7 mo by  carfanatics.

• This reply was modified 5 y, 7 mo by  carfanatics.

This is the color code I chose. I used the link you gave me to come up with the new css: http://www.colorzilla.com/gradient-editor/.

background: #45484d; /* Old browsers */
background: -moz-linear-gradient(top,  #45484d 0%, #000000 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#45484d), color-stop(100%,#000000)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top,  #45484d 0%,#000000 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top,  #45484d 0%,#000000 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top,  #45484d 0%,#000000 100%); /* IE10+ */
background: linear-gradient(to bottom,  #45484d 0%,#000000 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#45484d', endColorstr='#000000',GradientType=0 ); /* IE6-9 */

I am not an expert at this so please be as specific as possible.

1. Do I need the entire css code I posted above? If so does it come before or after this code? Or do I delete this and just replace the new css color code?

add_action( 'yt_header_end', 'yt_site_color_bars', 99 );
function yt_site_color_bars(){
	echo '<div class="site-color-preloader gradient clearfix hidden-xs"><div></div></div>';
}

2. Where exactly do I place the new css code?

• This reply was modified 5 y, 7 mo by  carfanatics.

• This reply was modified 5 y, 7 mo by  carfanatics.

What if I just want a solid black line, no color gradient?