Stats preview card component (Mobile First) solution

I just completed my first project and it is ready for review. I would greatly appreciate any feedback on the image overlay. I have never done an overly and to me it looks like the color of the overlay isn't quite right. I'm not sure if its because of the technique or if I missed a value when doing the linear gradient (Another first).

If you can also tell me if there are things I need to improve in the implementation I would appreciate it and value it. :-)