  We present arguments for including observations with all of the Wide Field
Instrument imaging filters, with the exception of F146, within the Nancy Grace
Roman Space Telescope (\emph{Roman}) High Latitude Time Domain Survey (HLTDS).
Our case is largely driven by the extragalactic deep field science that can be
accomplished with HLTDS observations and also by the improvements in type Ia
supernova (SN Ia) cosmology systematics that a wide wavelength coverage
affords.
