A system comprising a plurality of comparison samples each having a reflectance spectrum and being configured to substantially simulate a color of a keratinous element having a reflectance system. The reflectance spectrum of each comparison sample may be substantially similar to the reflectance spectrum of a respective keratinous element such that the comparison sample and the keratinous element appear to an observer to have substantially the same color under at least two differing illuminants.

 
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< Dyeing composition, method for obtaining the same and use for coloring the skin and/or keratinous fibres

> Skin tanning and light therapy incorporating light emitting diodes

> Compositions and methods for darkening the skin

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