Credits

Provenance

Every photograph's author and licence were written down by tools/fetch-photos.mjs at the moment it was downloaded, rather than reconstructed afterwards. A photograph whose licence is not recorded at download time is a photograph that ships uncredited.

File:Colorado Fall (Unsplash).jpg Andrew Preble (apreble) · CC0
File:Fall Colors 2018 (20181017-FS-Superior-SAR-005).jpg usfs_Eastern_Region · Public domain
File:Autumn Leaves - Retiro Park - Madrid 03.jpg Javier Perez Montes · CC BY-SA 4.0

Type

Instrument Serif and IBM Plex Sans / Mono, served from Google Fonts under the SIL Open Font License.

Colour

Solved by tools/palette.mjs against the hero photograph itself — 37 of 37 checks pass, including a deliberately unreadable control that the solver is required to reject.