You'll see that these typography elements don't have classes. That's because on this page, we want to edit the styles for general HTML tags. To modify the styles for a specific tag, select one of the typography elements and in the selector choose the "All [TAG NAME]" from the "Select a tag" section of the dropdown. This will effect all the elements on the site.
These colors have been created using Global Swatches. If you edit the Global Swatch color, it will change every element that uses that color swatch.
These are sample logo SVGs that can be downloaded straight from the site, or you could set up a download link that links with the file that's hosted with your cloud storage application of choice.