TARDIS blue adjective 1noun 1 adjective1 •Of this dark blue color.She wears a tacky T.A.R.D.I.S blue cardigan, buttoned to the max, over khaki slacks. — 2014 noun1 •The dark blue color of a traditional police box.He wore a black button-down shirt and gray slacks. […] On his feet, he wore his lucky shoes. The TARDIS blue was the only real color on him. — 2014