Gray space background for home sections on tablet

Hi,

I’m working on a MacBook Pro with Google Chrome for editing my website and when I uploaded my image for the counter section and the CallToAction section, everything was great.

But, when I check if everything is ok on my iPad, I saw that I have a gray background instead of an image in both sections. When I check on Safari, it’s also the same thing. So I didn’t understand.

So, I logged to my website with Safari and edited the gray sections with an image. Now, everything looks great except on a tablet device. The image seems to be very zoomed on a tablet and it’s very very ugly. So, I’m starting to feel like before it was better (with the gray instead of an image.) It’s still gray on a mobile device.

My question is : Is it possible to get back a gray background on a tablet instead of that ugly image and still have images on the computer.

Thanks for your help. I don’t know what to do now. Sorry for my english, it’s not my native language.