Abstract: The invention relates to a method and an arrangement for coloring optical fibres, each fibre being drawn through an upper nozzle in a coloring tool into a color chamber, into which colorant is introduced, and further through a lower nozzle out of the color chamber. The colored fibre is passed onward through a quartz tube of a UV lamp curing the colorant. To reduce costs and to increase the production rate, the coloring tools are arranged close to each other in pairs in at least two different planes, and the fibres to be colored are drawn simultaneously through the coloring tools and further simultaneously through the quartz tube of the UV lamp common to the fibres to be colored.