Tablepress background color

Hello,

I need help with changing the background color for the tablepress table containing logos on: https://www.spectrumconsult.net
Now I’ve entered this in the custom css in plugin options
‘.tablepress-id-1 tr {
background-color: #ffffff !important;
}’
I tried lots of different variations, but the background (padding) around the logos stays grey (and should be white)

What do I need to enter in the custom ccs?

Thanks, Elmer

https://www.ads-software.com/plugins/tablepress/