Moonlace

• WWizards of the Coast2006-09-25
  Official Ruling
  Moonlace's effect doesn't wear off.
• WWizards of the Coast2006-09-25
  Official Ruling
  If Moonlace is cast on a spell that becomes a permanent (a creature spell, an artifact spell, or an enchantment spell), the permanent will enter colorless and will remain colorless until it leaves the battlefield (or until another effect changes its color).

Rulings via Scryfall