Font

Please give me your URL to check and suggest required css change.

Great thank you https://www.ssifm.com and then https://www.ssifm.com/facilities-management/documents/

Im using a template that works but all the others Im unable to use because of the blue font on the grey background or the white font on a white background.

You may add following css at the end of your themes style.css:

.w3eden * {
    color: #ffffff !important;
}
.w3eden .thumbnail {
    background: transparent !important;
    border:0;
}