The phrase "shades of" is often used to convey different variations or levels of something. However, there are various synonyms that can be used in place of these two words to add a bit of variety and interest to your writing. Some alternatives to "shades of" include "nuances of," "degrees of," "variations of," "aspects of," "tones of," "tints of," "hues of," and "gradations of." Each of these words can be used to suit different contexts and situations, so it's important to consider which one best conveys the meaning you intend to express.