The slideshow of tints progresses from the warmer T3 tins to the high wavelength U2 tint. The lower the LED Bin, the higher the CRI (color rendition index). Therefore you should notice truer colors at the beginning than the end. Beam dissipation patterns can also affect tint perception. For example notice in slide 16 how the tight spot of the YK76's main beam is so concentrated there is more glare and reflection in the middle. The caption at bottom lists which emitter BIN and flashlight that was used for the shot.