The present invention relates to agents comprising cationic azacyanine dyes of the formula for coloring keratin fibers, such as, for example, wool, silk or furs and in particular human hair,and to a method of coloring hair with varying degrees of damage. The present invention can eliminate the reflective light on the internal optical surface of the optical system, using the phase plate and linear polarizer, in the color sequential driving of illuminating at least two colors on the single display panel at a random moment. Both the second and third inverters are powered with a negative supply voltage. A radial oil port is formed on the sidewall of the valve seat so as to allow oil from the oil inlet passage of the valve housing to flow into the valve seat, and flow from the valve seat toward the plunger through the orifice. The conductors define both electrical circuits and thermal heat sinks for the LED connector.