colourless
col-our-less
adjective
Lacking distinctive character, interest, or vitality; dull and uninspiring.
"His speech was rather colourless."
adjective
Having no colour; transparent or white, reflecting no particular hue.
"The pure water appeared colourless."
Thesaurus
Synonyms: neutral, pale, pallid, colorless, waxy, waxlike, drab, waxen, washed-out, washy, bleached, ashen