Sharpness and handicraft
Sharpness multiplies physical damage: red ×0.50, orange ×0.75, yellow ×1.00, green ×1.05, blue ×1.20, white ×1.32, purple ×1.39. Each weapon carries a fixed gauge per level — compare them on any weapon page.
Handicraft extends the maximum gauge; the Handicraft skill adds more. A weapon whose white is short loses real damage over a long fight — check the bar before committing.