Homonyms are words that sound the same but have different meanings and spellings.
* Dim could be a homonym for "dime" (a coin), but this is unrelated to a bucket.
* Colourless doesn't have a homonym that's relevant to the concept of a bucket.
Perhaps you're looking for synonyms for "dim" or "colourless" that could describe a bucket? For example:
* Dim: dull, faint, weak, shadowy
* Colourless: white, pale, transparent, unpigmented, bland
Let me know if you have any other questions!