Indigo Black Hair Color for Light Brown to Black Hair Logona's plant-based color care gives hair intense color, natural coverage and a healthy, radiant shine. Its high-quality vegan powder formula is composed, depending on the color type, of organic henna and other natural plant pigments. The natural coloring method. Thanks to the extremely fine grinding of the vegetable powder, the pigments of Logona vegetable dyes adhere optimally to the hair structure. By doing so, the hair structure is preserved, in addition to being wrapped in a protective layer. For a long-lasting and protective color that, combined with the natural hair color, creates unique tones. Logona vegetable powders will be mixed with boiling water, red wine, black tea or coffee to increase the intensity of the color, until obtaining a creamy paste. This paste is easy to apply and does not smudge.