Where can I find the vars used by Lovelace for colors?

I’ve seen configs where folks have references such as:
color: var(–paper-item-icon-color)
color: var(–paper-item-icon-active-color)

Is there a page/link where I can see all of the color “var” used by HA/Lovelace?

They are taken from themes.

Have a look here: Theme Color Chart - My UGLY Theme

And here: Share your Themes

And you can use this to try them out