Describing something that does not have a gray color, could imply brightness or liveliness.

जो रंगीन है

English Usage: Her artwork was mostly nongray, filled with vibrant colors.

Hindi Usage: उसकी कला मुख्यतः रंगीन थी, जीवंत रंगों से भरी हुई।

Referring to a color that is not gray, often used in the context of fashion or design.

धूसर नहीं

English Usage: The dress was a beautiful nongray shade that stood out in the crowd.

Hindi Usage: ड्रेस एक सुंदर धूसर नहीं रंग था जो भीड़ में खड़ा हो गया।