“Mainzer Initialen” was published at the beginning of the 20th century by the type foundries Ferd. Theinhardt and H. Berthold in Berlin. FDI Mainzer Initialen is a carefully digitized interpretation, extended to three colors and made available in modern color fonts formats. The package contains OpenType SVG fonts with 10 color palettes, which can be used in desktop applications, as well a single COLR/CPAL font, which gives access to the 10 palettes via CSS.