The list themes API only displays keywords for tone and color, which is not very helpful when we are creating an integration on top of your API. We would love to see the API return the hex codes of each theme or even a URL pointing to the theme thumbnail images you display in gamma.app. This way we can show the proper visual representation of the theme without "hacking" our way to it based on color keywords - which could end up giving users a misleading representation of what the theme will look like when they receive their generated presentation.