Source: The Silmarillion
Disclaimer: It is all sung by Tolkien, Kortirion only mouths the chorus
Arda slept in shadowy half-light, but grey-blue-black-darkness was not hard for them – they had been given eyes that saw clearly by starlight. Fires showed them brief, bright golden-reds, snow gave the purest blues-on-white, all else walked in the soft dusk beneath Varda’s scattered lamps.
Into the skies Tillion guided the vessel of the Moon and the scenery changed to silvered brightness. The reluctant ones who’d not journeyed west gazed with awe and delight on the silver-white-brilliance that darkened their shadows and illuminated the world.
Greater yet the change when Arien arose in fire... then Arda became every colour of light.