There are several synonyms for the term "hue cycles." One possible alternative could be "color transitions," which refers to the way in which colors shift and change over time. Another option might be "chromatic progressions," which emphasizes the gradual evolution of color patterns. A third choice could be "tonal shifts," which highlights the way in which colors darken or lighten as they cycle through various shades. Other synonyms for "hue cycles" might include "color waves," "chromatic fluctuations," or "tonal progressions." Whatever term is used, it should capture the dynamic, changing nature of color patterns and the way in which these patterns can evolve over time.