Unfadable

verb (used without object), faded, fading.
1.
to lose brightness or vividness of color.
2.
to become dim, as light, or lose brightness of illumination.
3.
to lose freshness, vigor, strength, or health:
The tulips have faded.
4.
to disappear or die gradually (often followed by away or out):
His anger faded away.
5.
Movies, Television.

to appear gradually, especially by becoming lighter (usually followed by in).
to disappear gradually, especially by becoming darker (usually followed by out).

6.
Broadcasting, Recording.

to increase gradually in volume of sound, as in recording or broadcasting music, dialogue, etc. (usually followed by in).
to decrease gradually in volume of sound (usually followed by out).

7.
Football. (of an offensive back, especially a quarterback) to move back toward one’s own goal line, usually with the intent to pass, after receiving the snapback from center or a hand-off or lateral pass behind the line of scrimmage (usually followed by back):
The quarterback was tackled while fading back for a pass.
8.
(of an automotive brake) to undergo brake fade.
verb (used with object), faded, fading.
9.
to cause to fade:
Sunshine faded the drapes.
10.
(in dice throwing) to make a wager against (the caster).
11.
Movies, Television.

to cause (a scene) to appear gradually (usually followed by in).
to cause (a scene) to disappear gradually (usually followed by out).

12.
Broadcasting, Recording. to cause (the volume of sound) to increase or decrease gradually (usually followed by in or out).
noun
13.
an act or instance of fading.
14.
Movies, Television Informal. a fade-out.
15.
Automotive. brake fade.
verb
1.
to lose or cause to lose brightness, colour, or clarity
2.
(intransitive) to lose freshness, vigour, or youth; wither
3.
(intransitive; usually foll by away or out) to vanish slowly; die out
4.

to decrease the brightness or volume of (a television or radio programme or film sequence) or (of a television programme, etc) to decrease in this way
to decrease the volume of (a sound) in a recording system or (of a sound) to be so reduced in volume

5.
(intransitive) (of the brakes of a vehicle) to lose power
6.
to cause (a golf ball) to move with a controlled left-to-right trajectory or (of a golf ball) to veer gradually from left to right
noun
7.
the act or an instance of fading
fade