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.

Enchanting: Boots Enchants
RecipeMakesReagentsNeedsSkill-up
Enchant Boots - Minor AgilityTaught by Formula: Enchant Boots - Minor Agility, requires 125
  • Runed Silver Rod
Yellow 150Grey 190
Enchant Boots - Minor StaminaTaught by Formula: Enchant Boots - Minor Stamina, requires 125
  • Runed Silver Rod
Yellow 150Grey 190
Enchant Boots - Lesser Agility
  • Runed Golden Rod
Yellow 180Grey 220
Enchant Boots - Lesser Stamina
  • Runed Golden Rod
Yellow 190Grey 230
Enchant Boots - Lesser SpiritTaught by Formula: Enchant Boots - Lesser Spirit, requires 190
  • Runed Golden Rod
Yellow 210Grey 250
Enchant Boots - Stamina
  • Runed Truesilver Rod
Yellow 235Grey 275
Enchant Boots - Minor Speed
  • Runed Truesilver Rod
Yellow 245Grey 285
Enchant Boots - Agility
  • Runed Truesilver Rod
Yellow 255Grey 295
Enchant Boots - Greater StaminaTaught by Formula: Enchant Boots - Greater Stamina, requires 260
  • Runed Truesilver Rod
Yellow 280Grey 320
Enchant Boots - SpiritTaught by Formula: Enchant Boots - Spirit, requires 275
  • Runed Truesilver Rod
Yellow 295Grey 335
Enchant Boots - Greater AgilityTaught by Formula: Enchant Boots - Greater Agility, requires 295
  • Runed Truesilver Rod
Yellow 315Grey 355

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