CUSTOM CODE FOR RECOLOR OF HEADER + MENU

Is it possible to do a custom code embedded into this section for Banner title + button + menu to be white on this landing page only? or does the CSS have to be edited for each specifically?

https://www.jyima.com/outside-the-jyim-podcast

@jyimajyim Add to Home > Design > CUstom CSS

body#collection-5cf57b89e8828600018104a5 header.Header.Header--bottom.Header--overlay * {
    color: white;
}
div#block-yui_3_17_2_1_1570388324442_5627 {
    color: white;
}