Multi-Colored Noise Shader

I need a shader that takes 3 input colors and generates noise as seen below.
It is easy to achieve in Blender with the help of the “Noise Texture” and the “Color Ramp” nodes.

I’ve found this gist, which might solve my problem. But I wasn’t able to configure the colors. And also the noise looks a lot “sharper” than the result in Blender.

I could imagine, that this has been done by someone before :slight_smile: