Each recipe is orange until its yellow rank and grey from its grey rank. When the ranks differ, it turns green somewhere between the two; the client files give both ranks but not that point. Equal ranks go straight to grey.

Cooking: Camping
RecipeMakesReagentsNeedsSkill-up
Basic Campfire
Basic Campfire KitQuantity not confirmedYellow 1Grey 5
Journeyman CampfireTaught by Blueprint: Journeyman Campfire, requires 90
Journeyman Campfire KitYellow 95Grey 105
Cookie's FeastTaught by Blueprint: Cookie's Feast, requires 140
Cookie's FeastYellow 145Grey 150
Expert CampfireTaught by Blueprint: Expert Campfire, requires 200
Expert Campfire KitYellow 205Grey 220
Iron OvenTaught by Blueprint: Iron Oven, requires 300
Iron OvenGrey 300

From the Forever beta client files, build 1.60.1.70630: the SkillLine, SkillLineAbility, TradeSkillCategory, SpellReagents, SpellEffect, SpellTotems, SpellCastingRequirements and ItemEffect tables.