Adafruit flora wearable sensors modules and neopixels adafruit 1356 the adafruit flora colour sensor uses the tcs34725 sensor which includes 4 x photodiodes covered by an ir blocking filter for greater accuracy three of the photodiodes are covered with coloured filters to provide the individual rgb values and the fourth is left clear for an overall value with a dynamic range of 38 million to 1 and adjustable integration time and gain its even possible to use this sensor behind darkened g