COLR/CPAL fonts are one type of OpenType color fonts. These fonts compose layers of vector outline glyphs and color palette information into the final colored glyph. With this change, Chrome will support 3 color font formats cross-platform, the other two being CBDT/CBLC and SBIX. Because they are vector based, COLR/CPAL fonts provide for faster downloads and require less storage. An example of a COLR/CPAL font is the Twemoji color font (https://github.com/mozilla/twemoji-colr).
Samples: https://pixelambacht.nl/chromacheck/ https://github.com/mozilla/twemoji-colr