center foot image

Good Day, I’m using this CSS in my Catch Flames theme to change the background color which is working good.

#supplementary .widget {
background-color: #ffc;
margin-bottom: 0px;
}

I have an image in the footer widget and I have placed the code for that image in the Appearance/Widgets/”Footer Area One”. I used a ‘text’ widget to place the image in.

I am only using ONE footer for this site.
I would like to have the image aligned center across the enter width of the website and have tried several versions of code to try and make that work, but not having any luck.
I have tried code in both areas, CSS section and the Widget Text section.

THANKS in advance for the help. Karlopa