This "Full Spectrum" LED gives off a pinkish colour, because its light is composed mostly of red and blue.
The spectral power graph (the image from the supplier) shows the distribution of wavelengths given off by this LED. The range is from approximately 400nm to 840nm with peaks of red and blue. The LED also gives off a substantial infrared component, similar to the sun's natural ouput.
Full spectrum plant LEDs are a recent invention, able to act as the sole light source for all plant stages.