Reply To: Hey there, tried recreating what I saw on the video in Blender 2.91 as best I could, but hit an odd snag with colors not working correctly, how do I fix this?

[Jonathan Lampel]

• Reflection Tint: What black-ish circle are you seeing?  It seems to be working fine in the file you sent. 
• Reflections: This also seems fine in your file. If you’re mixing in the glossy shader based on the Fresnel value after the dispersion then you should be fine. It might just not be obvious in your scene because it’ll only be screen space reflections and only along the edges. 
• Alpha Hashed Color Fix: Your mix node there and the mix node right above it in the Edge fix need to be set to pure white in order for it to work correctly. This could explain the incorrect darkening. If the glass shader’s color is set to a greyscale value, the color fix should have zero effect. 

Hope that helps!