One common antonym for the word vivid is dull.
To explain further, vivid refers to something that is bright, intense, or powerful in appearance or effect, such as a vivid color or a vivid memory. On the other hand, dull signifies a lack of brightness or intensity. In contexts like art, a dull color would be one that is muted or less striking, whereas in storytelling, a dull narrative might fail to engage the audience vividly. Thus, while vivid brings to mind images of liveliness and clarity, dull offers a contrasting sense of flatness and boredom.