You might want to do more research
Actual color is a wavelength of light, and like the number line there are an infinite amount of numbers between any two values. Restrict it to whole nm's, and you still are left with a PAR range of ~665 nm's, or with the restriction, around 665 possible colors. In the sense that only one of those could be called green, you are correct, however being this pedantic is more confusing than helpful. The reality is that colors are reflected light wavelengths. Plant leaves appear green because green light is being reflected off them, and that light is not being used by the plant at all. Though there are certainly going to be spectra close to the greens reflected, which one might call green (or more properly a shade of green), the color you are seeing reflected back is not being absorbed by the plant.
In regards to other posts, photosynthesis is not what determines flowering. Another way to understand this statement is that plants use light for other purposes besides photosynthesis. For instance, flowering is induced by a hormone which is degraded very quickly by light. Other than both hormone degradation and photosynthesis both rely on light, the two have nothing to do with each other (except without photosynthesis the plant won't have enough energy to continue producing proper levels of hormones). I don't know if this hormone is degraded by spectra in the green range, however it doesn't really matter because the color of chlorophyll reflects the green, which prevents it from reaching the hormone within the plant.
If this is still not making a lot of sense, do some reading on the kelvin spectrum scale. This measures the heat signatures of different spectra radiated from a black surface. The descriptions will go a lot more into the science of light energy absorption and analyzing spectral lines.
