Nexton Baby Cologne comes in different colours mainly to differentiate scent variants, not because of strict fragrance rules. The brand does not publish an official colour-to-scent chart, but retailers commonly describe them this way:
Pink – Soft, sweet, baby-powder or light floral scent
Blue – Fresh, clean, airy scent (very popular for daily use)
Green – Mild fresh or citrus-inspired scent
Yellow – Light, cheerful, slightly sweet freshness
Purple – Slightly richer, calming scent
Peach – Soft fruity-sweet baby scent
All variants are gentle, alcohol-light, and suitable for babies. Choice is best based on scent preference, not colour meaning.