Antonyms for the word "making vivid" include dulling, fading, blurring, obscuring, fading into the background, and making hazy. These words describe the opposite of making something clear and vibrant. When something appears dull or faded, it lacks the sharpness and clarity that would make it stand out. Blurring and obscuring make details unclear, while fading into the background and making hazy allow things to become vague and indistinct. All of these antonyms describe the opposite of making something vivid and clear, instead making it harder to see and understand.