I guess the coaching staff doesn't know how to check Tech's own website (available for media) that specifies what Tech's official school colors are.
http://www.latech.edu/media/identity_standards.pdf
Tech's official colors are Tech Red (PMS 185) and Tech Blue (Reflex) (PMS 287).
No primary uniform color for any Tech team should be other than those two colors except for white or grey uniforms as dictated by sport playing rules and for approved special events such as pink uniforms for breast cancer awareness, etc. And any uniform worn more than twice in a season constitutes a primary uniform color.
Team coaches should have NO SAY in the matter except to get approval for the previously mentioned special events. Coaches do not determine the official school colors. Black is not a Tech school color. Columbia blue is no longer a Tech school color.
That said, ANY color can be used for uniform trim. And that is exactly where columbia blue belongs now...trim only.