New Natural Food Colour: Dracula-red

Red food colourants play a central role in consumer perception and product appeal, yet many synthetic dyes face increasing regulatory scrutiny due to potential health risks, while natural alternatives often suffer from instability under heat, light, or acidic conditions.This study introduces Dracula-red, a novel red colourant produced from turmeric, sodium bicarbonate, and citric acid through brief exposure to low-heat microwave frequencies.The method uses ingredients generally recognised as safe and yields a visually intense, heat-stable red hue suitable for culinary applications.Colour measurements obtained via mobile RGB analysis and converted to CIELAB space indicate a pronounced perceptual shift (Δ ≈ 55) from yellow to deep red.Classical acid-base explanations do not account for the transformation, which occurs only under microwave excitation.A resonance-based, vibrational phase-locking hypothesis is proposed to explain this behaviour, supported by the reversible return to yellow upon dilution with ethanol or vinegar.The resulting colour may be described as a pseudo-colour, arising from a specific physical configuration rather than a permanent chemical modification.This proof-of-concept demonstrates a simple, reproducible approach to generating a natural red colourant and highlights the need for further spectroscopic and structural studies to characterise the underlying mechanism and assess broader applications.