Is there a Color Matrix equivalent in Unity?

In regular C#/.NET, they use GDI namespace to create ColorMatrix. More info can be found here: Color Transformations and the Color Matrix

Is there a way to quickly manipulate an image using ColorMatrix instead of GetPixel/SetPixel?

I don’t know about ColorMatrix in .NET, but I guess those effects can be done using materials and shaders: Unity - Manual: Shaders