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.

Alchemy: Greater Transmutations
RecipeMakesReagentsNeedsSkill-up
Transmute: ArcaniteTaught by Recipe: Transmute Arcanite, requires 275
Arcanite BarQuantity not confirmed
  • Philosopher's Stone
Yellow 275Grey 290
Transmute: LegioniteTaught by Recipe: Transmute Legionite, requires 275
Legionite BarQuantity not confirmed
  • Philosopher's Stone
Yellow 275Grey 290

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