Change Banner Text Colour on a Single Page

Hello, I am trying to change the text over the banner image in intro to a white colour, as the image is busy and colourful. My template has black text on all other pages and that is fine, however I need CSS only for this page. I've tried a few CSS options, but they have failed me. Here is my website page I am struggling with - www.danilova.com.au/the-amber-room. The text I would like changed to white is "The Amber Room".

Thank you!

@danilova

body#collection-5d2c4798dab1da0001f3be87 h1 {
   color: #fff;
}

Thank you for the suggestion, however upon trying it, it doesn't seem to change anything :(

@danilova try adding !important to after, eg. color: #fff !important;