Separate colors for Chrome-proprietary and only-Chrome-has-implemented-yet APIs

[CrazyPython]

trafficstars

Sometimes an API isn't in Firefox or Safari because they believe that the feature is harmful, and refuse to implement due to privacy or security concerns, such as Web USB: https://mozilla.github.io/standards-positions/#webusb

Other times, Firefox and/or Safari are implementing or considering implementing it, and only Chrome has fully implemented it yet, such as the Badging API: https://mozilla.github.io/standards-positions/#badging.

@codestance, can you help make separate colors for these two cases?

[CrazyPython]

Perhaps we could have colors tinted to mean "Supported only in Firefox" or "Supported only in Safari"