I included Materialize CSS first and then . I linked my css file.
In which I have an example class that sets the property background-colorto red, but that does not override the default color (which is set by materialization-css).
Here is an example:
https://jsfiddle.net/79ss2eyr/1/
I would not want to change anything in materializing the source files, instead I want to add additional classes and set additional colors.
Here's what the inspector says:

How do I do this and why my css properties do not override materialization, since it is associated with the after frame?