What color of dye can be used to signal distress?

Bright orange or red dye markers are used to signal distress because these colors are highly visible and easily recognizable against various backgrounds, particularly water. In emergency situations, the ability to capture the attention of nearby vessels or aircraft is crucial. Orange and red are universally associated with warning and alertness, making them optimal choices for distress signaling.

In maritime contexts, bright orange and red dyes stand out against blue water and sandy shores, ensuring they are noticeable from a distance. This characteristic is essential for effective signaling, as the goal is to make the distress call unmistakable to rescuers.

Other color options such as bright green, blue, or yellow do not provide the same level of visibility or recognition for distress signals, thus making them less effective in urgent situations where immediate attention is necessary.