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.

Leatherworking: Armor Kits
RecipeMakesReagentsNeedsSkill-up
Light Armor Kit
Light Armor KitYellow 30Grey 60
Medium Armor Kit
Medium Armor KitYellow 90Grey 105
Forceful Medium Armor KitTaught by Pattern: Forceful Medium Armor Kit, requires 80
Forceful Medium Armor KitYellow 95Grey 110
Mystic Medium Armor KitTaught by Pattern: Mystic Medium Armor Kit, requires 80
Mystic Medium Armor KitYellow 95Grey 110
Heavy Armor Kit
Heavy Armor KitYellow 145Grey 165
Forceful Heavy Armor KitTaught by Pattern: Forceful Heavy Armor Kit, requires 135
Forceful Heavy Armor KitYellow 155Grey 175
Mystic Heavy Armor KitTaught by Pattern: Mystic Heavy Armor Kit, requires 135
Mystic Heavy Armor KitYellow 155Grey 175
Thick Armor Kit
Thick Armor KitYellow 195Grey 215
Forceful Thick Armor KitTaught by Pattern: Forceful Thick Armor Kit, requires 185
Forceful Thick Armor KitYellow 205Grey 225
Mystic Thick Armor KitTaught by Pattern: Mystic Thick Armor Kit, requires 185
Mystic Thick Armor KitYellow 205Grey 225
Rugged Armor Kit
Rugged Armor KitYellow 225Grey 245
Forceful Rugged Armor KitTaught by Pattern: Forceful Rugged Armor Kit, requires 235
Forceful Rugged Armor KitYellow 235Grey 255
Mystic Rugged Armor KitTaught by Pattern: Mystic Rugged Armor Kit, requires 235
Mystic Rugged Armor KitYellow 235Grey 255
Wild Leather Armor KitTaught by Pattern: Wild Leather Armor Kit, requires 300
Wild Leather Armor Kit
  • Sewing Machine
Yellow 310Grey 325
Core Armor KitTaught by Pattern: Core Armor Kit, requires 300
Core Armor KitYellow 320Grey 340

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