"Most violaceous" is a unique way to describe a deep purple color. However, there are many synonyms that can be used instead. Some options include: deep purple, dark violet, plum, amethyst, lavender, indigo, eggplant, and grape. Each of these synonyms has a slightly different connotation and can be used to convey a specific shade of purple. For example, "grape" may evoke a brighter, more vibrant purple, while "eggplant" may suggest a darker, more muted tone. Experimenting with different synonyms can add depth and nuance to your writing, and help you to evoke the exact shade of purple you have in mind.