Abstract

Effective communication during disasters remains a challenge, mainly when traditional methods become impractical. The Rescue Light Communication System (RLCS) is a new, colour-based signalling method integrated into the Krizor mobile application, aiming to resolve this issue. RLCS utilises an extended RYB colour model, with the addition of white, to visually represent an individual’s status during emergencies. By assigning specific meanings to each colour (for example, green for “I am okay.” and red for “I have severe injuries.”), RLCS offers a straightforward and intuitive method for non-verbal emergency signalling. Although currently in an alpha trial phase, RLCS is designed to work offline and can be adapted for both digital and physical signalling. This paper explains the rationale behind using the extended RYB model, reviews relevant literature on colour perception, emergency communication, and standardisation, and outlines potential applications and future research directions.