The word "more discolored" suggests that an object is becoming increasingly stained, spotted or faded. The opposite of this would be "less discolored", indicating that the object is becoming cleaner, brighter or more vibrant. Other possible antonyms might include terms like "improved", "restored", or "renewed", all of which suggest that something is being enhanced or revitalized in some way. For example, if a piece of clothing is "less discolored" it might look freshly laundered or professionally cleaned, whereas if it is "more discolored" it might appear worn or dated. Overall, the antonyms for "more discolored" point to the idea of improving or rejuvenating something that has become dull or faded over time.