and blue components of the light that correspond to maximum reflectance, then you know the color of the object. Their sensor uses a four-lead RGB LED, but we suppose a Neopixel could be used as well.

Here's a video with a depiction of how RGB backlighting looks, and how that translates to the final image. With less aggressive color filtering needed in the pixels, less light is absorbed as it ...

[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor ... of resistance when exposed to varying levels of light sensitivity. That makes for great resolution ...