Blender Daily writes: The color ramp is probably one of the most used nodes for creating materials. In this video Nik goes through all of its features and gives you tips and tricks to make its use more effective. This video is for both beginners and advanced Blender users.  

Source

from BlenderNation https://www.blendernation.com/2020/12/20/in-depth-look-at-the-color-ramp-node-in-blender/
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