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.

First Aid: Bandages
RecipeMakesReagentsNeedsSkill-up
Linen Bandage
Linen BandageYellow 30Grey 60
Heavy Linen Bandage
Heavy Linen BandageYellow 50Grey 100
Wool Bandage
Wool BandageYellow 80Grey 150
Heavy Wool Bandage
Heavy Wool BandageYellow 115Grey 185
Silk Bandage
Silk BandageYellow 150Grey 210
Heavy Silk BandageTaught by Manual: Heavy Silk Bandage, requires 180
Heavy Silk BandageYellow 180Grey 240
Mageweave BandageTaught by Manual: Mageweave Bandage, requires 210
Mageweave BandageYellow 210Grey 270
Heavy Mageweave Bandage
Heavy Mageweave BandageYellow 240Grey 300
Runecloth Bandage
Runecloth BandageYellow 260Grey 320
Heavy Runecloth Bandage
Heavy Runecloth BandageYellow 290Grey 350
Crystal Infused BandageTaught by Unrevealed item #23689
4 × Crystal Infused BandageYellow 300Grey 360
Dense Runecloth BandageTaught by Manual: Dense Runecloth Bandage, requires 300
Dense Runecloth BandageYellow 315Grey 340

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