How can I use vertex colors as an input in my material? I want to use vertex colors as a mix factor in my material. However when I chose Add->Input the option Vertex Colors doesn't show up. Why can I not access the vertex colors data? I want to avoid using any python scripts or any workarounds with the Attribute node if possible.
Using Blender 2.8.
Even easier than the suggestiong of @Robert Gützkopf: Enable the Node Wrangler Addon. It will put that option exactly where you pointed out it's missing.