A single clue was found hidden in a post to the game-announcements channel.
Taking the first letter of the role each actor played on the TV show Yellowstone gives the string “NOSTONE”, directing us to remove “STONE” from “YELLOWSTONE”; another clue pointing to “yellow”.
Nurse - Kelsie Elena
Old Cowboy - James Pickens Jr.
Spencer Dutton - Charlie Stover
Thomas Rainwater - Gil Birmingham
Oil Worker - Derek Reid Boone
News Anchor Jane - Julia Cavanaugh
Ellis Steele- John Emmet Tracy
This clue can also be found in SHHH.