Faded away describes something that grew weaker and slowly disappeared over time. It can refer to light, sound, color, feelings, or even a person's energy or presence. It suggests a gentle, gradual end.
When I was a child I thought I saw an angel. It had wings and kinda looked like my sister. I opened the door so some light could come into the room, and it sort of faded away. My mother said it was probably my Guardian Angel. Denzel Washington
I feel half faded away like some figure in the background of an old picture. Iris Murdoch
Accordingly the Northern races of Europe found their inspiration in the Bible; and the enthusiasm for it has not yet quite faded away. Lafcadio Hearn
Why you scared? / You'll never change what's been and done All of the stars / Have faded away / Just try not to worry / You'll see them someday / Take what you need / And be on your way / And stop crying your heart out. Noel Gallagher
Kindness is the only service that will stand the storm of life and not wash out. It will wear well and will be remembered long after the prism of politeness or the complexion of courtesy has faded away. Abraham Lincoln
In the tenth century the old Batavian and later Roman forms have faded away. John Lothrop Motley