Change the color

Hello,

I need to change the style of the form but I can’t figure out how to do it. I tries few css code but it’s not working.

This is my form : https://test.container-ephemere.com/demande-de-devis

I want the border of the input to be blue and the background white.
I succeeded to change the color of the label (nom, prénom…) ibto black instead of grey but when we write on the input it’s still grey.

Can you help me ?

Thank you so much !

The page I need help with: [log in to see the link]