Gegenstand der Erfindung ist ein Mittel zur durch Luftsauerstoff induzierten Färbung keratinhaltiger Fasern, insbesondere menschlicher Haare, welches in einem kosmetisch akzeptablen Träger bei einem alkalischen pH-Wert von 8 bis 10,5 mindestens eine Verbindung der Formel (I),und mindestens ein pflanzliches Öl auf Basis eines Fettsäuretriglyceridgemischs (B) enthält, wobei neben Luftsauerstoff kein zusätzliches Oxidationsmittel enthalten ist, und wobei das Fettsäuretriglyceridgemisch (B) einen Anteil von mindestens 25 Gew.-% Palmitoleinsäure, bezogen auf das Gesamtgewicht aller Fettsäuren des Fettsäuretriglyceridgemisches (B), aufweist.Agent comprises at least one substituted benzene compound (I) and at least one vegetable oil based on fatty acid triglyceride mixture containing at least 25 wt.% of palmitoleic acid, in a carrier with an alkaline pH of 8-10.5, where besides oxygen, no additional oxidant is contained in the agent. Agent comprises at least one substituted benzene compound of formula (I) and/or its salt with an organic or inorganic acid and at least one vegetable oil based on fatty acid triglyceride mixture containing at least 25 wt.% of palmitoleic acid, in a carrier with an alkaline pH of 8-10.5, where besides oxygen, no additional oxidant is contained in the agent. R1 : H, 1-4C-alkyl or 1-4C-hydroxyalkyl V1 : CHR3 or CR3 W1 : CHR2 or CR2, where if V1 and W1 is CHR3 or CHR2, respectively, the bond between V1 and W1 is a single bond and if V1 and W1 is CR3 an CR2 respectively, the bond between V1 and W1 is a double bond R2 : H or COOH, where -COOH group optionally being present as a salt with a cation R3 : H or 1-4C-alkyl R4, R5 : H, 1-4C-alkyl or COR6 and R6 : 1-4C-alkyl. An independent claim is included for oxygen-induced coloring of keratin fibers, preferably human hair comprising applying the agent on the fibers, leaving the agent on the hair for 2-120, preferably 10-40 minutes and subsequently rinsing. [Image].