Color header

Hello,
I got this code from the forum, how to replace the image with a colored background.
Thank you. Thank you.

link to the discussion: https://www.ads-software.com/support/topic/change-header-image-on-all-pages-except-home/
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body:not(.home)
.wp-custom-header img {
display: none;
}

body:not(.home) .custom-header {
background-image: url(https://pbs.twimg.com/profile_images/972154872261853184/RnOg6UyU_400x400.jpg);
}