Help with applying a color palette

I settled on the above color palette for my site/app. Can someone let me know if I am applying it correctly, please? Applied to trainermade.com

Do I just stick with these 5 main colors, or do I apply shades as well? For my app, I don't see how I can just limit myself to these 5 colors. I applied these colors with guidance from colormind.io, the landing page demo its spits out looks nice, but the UI template adds a whole bunch of other colors and essentially make the app kinda weird looking.

Landing page/site is in the fitness space. My logo colors are kinda locked with Blue: #425b97
Grey #9e9f9e

Just looking for some guidance. Thanks!