noun
gradation
gruh-DAY-shuhn/ɡrəˈdeɪʃn/
A gradual progression through degrees or levels.
The paint chips show a gradation from very pale blue to deep blue.

Etymology
The image is an ascent by steps: each step contributes to an ordered progression. Gradation applies that stepwise pattern to changes through successive degrees.
In context
so there's a gradation from large to small gradation is used in so much of visual art because it is so pleasurable people enjoy seeing the gradual change of an element from one extreme to the other
More examples
- The exercises follow a gradual gradation from easy to difficult.
- The singer uses subtle gradations in volume to build tension.
- The fabric displays a delicate gradation of color.
Forms
gradation · gradations
gradual adjective — Changing or developing in small steps.
Similar words
- progression
- Emphasizes movement through stages, not necessarily small, smooth changes.
- transition
- Emphasizes change between states rather than a succession of degrees.