Multi-mode laser diodes in general have really bad divergence.--how bad depends on the particular diode and wavelength. As far as red goes you need to specify a wavelength not a color i.e. 638nm orange red, 650 red or 660nm red and so on.
Color is not a physical property; it is merely the brain’s interpretation of different wavelengths of light. Color names are words/symbols for that brain activity.
Wavelength is a physical property.