I looked on pixel and searched but couldn’t find it.
I did inspect the site as Stan did and looked up blend-mode
I found this link on the forum
Vincent adds this
<style>
.multiply {mix-blend-mode: multiply}
</style>
add a class to the div etc of multiply and the .multiply means apply this to anything with the class name of multiply.
Then its a bunch of vertical divs that change as the pages scrolls.
Hope that helps a little bit. At least I learned some more code!