a.
1.
Uncolored, untinged, achromatic.
2.
Pale, pallid, blanched, hueless, livid.
3.
Dull, monotonous, characterless, blank, expressionless, inexpressive.
COLORLESS
Meaning of COLORLESS in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012