This is Chromatic Etruscan, a font by John Stracke, loosely based on a family of wood type faces of the same name sold by William Page & Co. in the late 19th century. The original type face was manufactured at very large sizes, for use on advertising posters and similar, and it was designed to be used in color. Page advanced the state of the art in wood type, improving how accurately the different colors matched up. As far as I know, the original typeface did not have any lowercase letters, so, for this font, I have used small capitals.
To produce color, this font uses the SVG-in-OpenType standard, which is new as of 2017. As of August 2017, it is supported in Firefox, in Edge (the default browser on Windows 10), in Photoshop 2017, and perhaps in some other Windows 10 apps (the operating system provides API support for it). In other apps, Chromatic Etruscan will be displayed as an ordinary black-and-white font.
Chromatic Etruscan is distributed under the SIL Open Font License. The current version, 0.9, covers all of ASCII and Latin-1, with basic kerning.
Sample text: The quick rainbow fox jumps over the lazy dog. Or I have a longer sample page, which includes a link to a PDF so you can see the color font if your browser doesn't support it.
Installation instructions: First: if you don't know which one you want, you probably want the OpenType version. WOFF is for serving up on Web pages; OpenType is for installing on your machine. On Windows, you can install the font by right-clicking on the downloaded OTF file and clicking "Install". On Mac, double-click the OTF file to open Font Book (comes with the OS), and click the Install Font button in the lower right. On Linux, create a folder in your home directory called ".fonts" and put the OTF file there.