Color Glass is generally characterized as either longpass or bandpass. It will transmit some band of energy while blocking the shorter and longer wavelengths.
color glass spectrum:
catalogue for optical color glass
ZWB Glass resemble Schott UG Glass Black blue glasses, ultraviolet transmitting
QB Glass resemble Schott BG Glass Blue, blue-green, and multiband glass
LB Glass resemble Schott VG Glass Green glass
JB Glass resemble Schott GG Glass Yellow glass
CB Glass resemble Schott OG Glass Orange glass
HB Glass and HWB Glass resemble Schott RG Glass Red and black glass, IR transmitting
AB Glass resemble Schott NG Glass Neutral glass with uniform attenuation in the visible range
ZB Glass resemble Schott WG Glass Colourless glass with different cut-offs in the UV range
which transmit in the visible and the IR range
GRB Glass resemble Schott KG Glass with high transmission in the visible
and absorption in the IR range (heat protection filters)
