There are a few realities of Light Emitting Diodes (LED), visible light and the human eye, and discernibility in a high glare situation. The goal should be to distil the warning down into the minimal useful “buckets” while not including colors that can be misconstrue from one another. Other possible colors that either are included in our units or excluded for reasons given:
White (Reserved) – is reserved for area, flood, or faceplate lighting. White LEDs are ideal for illumination at night, however, not effective during the day. We use white LEDs to light up our signage and phones for nighttime emergencies.
Blue (Reserved) – is reserved for emergencies only. Including blue within the BNL may confuse swimmers if ever a red and blue combination is possible. Due to it’s universal understanding that blue relates to “emergency”, “police”, “safety” and our relationship with Code Blue Corporation we’ve reserved blue for active emergencies. Blue lights therefore are only active when emergency equipment is activated to clearly indicate it’s intrinsic intent. Also given it’s low wavelength its not recommended to have a light of this nature always on to protect marine life.
Orange (Excluded) – is typically difficult to differentiate from yellow or red in high glare situations. Our ‘yellow’ lights are actually a hue of amber and could be argued to be orange. Cyan (Excluded) – is also excluded as to not confuse with blue and follows the same arguments as blue as to not include in the BNL.