Not quite.
**broken link removed**
Chlorophyl-a has a small peak in the blue end at 410nm (hence the UV LED) then the major peak at the blue end at 430nm. Then we have Chlorophyl-b peaking at 460nm in the blue end followed by the carotenoid second peak at 480nm. The carotenoids pass energy from that spectrum to the chlorphyll in low light situations. Finally down at the red end you have Chlorophyl-b again peaking at 635nm and Chlorophyl-a peaking at 660nm.
Plant spectrum use drops off sharply past the peaks and less sharply behind them. Thus a 670nm red will be far less effective than a 650nm red and, in fact, spectrums into the orange range have been proven effective. Similarly a 440nm blue is much less useful than a 420nm blue. A plant without blue light will begin to grow spindly whereas a plant without red will almost not grow at all. Thus red around 660nm is the most important but none of the peaks, save the carotenoid, are trivial. Studies have shown (google if you are curious) that anywhere from 1% to 20% (8% nominal for lettuce) blue light is most effective. Lastly, plants absorb no light in the invisble IR but some in the invisible UV.