how to change blockquote color

Hi,

You can use the below CSS to override the style for blockquotes. Add this to WP Admin > Appearance > Editor > KLEO Child > Style.css or via WP Admin > Theme Options > General Settings > Scroll to: ‘Quick CSS’

blockquote {
    background-color: black;
    color: white;
    border-left: solid 5px red !important;
}

Adjust the values to suit your needs, save, and clear any WordPress cache, server cache and CDN then purge your browsers cache (Ctrl+F5) to see changes.

Thanks,

Kieran