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.

Fishing: Camping
RecipeMakesReagentsNeedsSkill-up
Fish Bowl
Fish BowlGrey 20
Fishing RackTaught by Blueprint: Fishing Rack, requires 140
Fishing RackYellow 140Grey 145
Fishing HutTaught by Blueprint: Fishing Hut, requires 300
Fishing HutGrey 300

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