The most important words in yellowism

In yellowism, all and everything is flattened to yellow, therefore yellowism is not art.

flat·tened, flat·ten·ing
transitive verb
: to make flat: as
a : to make level or smooth
b : to knock down; also : to defeat decisively
c : to make dull or uninspired
d : to make (as paint) lusterless
e : to stabilize especially at a lower level
intransitive verb
: to become flat or flatter: as
a : to become dull or spiritless
b : to extend in or into a flat position or form
c : to become uniform or stabilized often at a new lower level

a : a color like that of egg yolk, ripe lemons, etc.; the primary color between green and orange in the visible spectrum, an effect of light with a wavelength between 570 and 590 nm

a : all that exists