These layouts are symbols, that are meant to be unlinked once they are used.
Webflow does not support putting layouts in the layouts menu, so we use symbols to achieve the same goal. Basically a fancy copy paste way of doing things. The "master" is stored here, so below here should be the only instance of the webflow symbol. It can be easily inserted where needed via the symbols menu. Unlink the symbol immediately after inserting it in a page. This way, colors can be changed, etc.