PROBLEM TO BE SOLVED: To provide a composition for dyeing, in particular, keratin fibers, such as hair, which makes it possible to achieve a desired lightening, and exhibits improved dyeing properties so that the composition can be used and applied easily, in particular, the mixture does not flow and remains locally securely at the application site.SOLUTION: The present invention relates to the composition containing: i) nonionic ether of polyoxyalkylenated fatty alcohol represented by formula (I); ii) a fatty substance; iii) optionally, a surfactant other than i); iv) at least one direct dye and/or at least one oxidation dye; v) optionally, a basifying agent; and vi) optionally, a chemical oxidizing agent, in which the fatty substance content is at least 25 wt.% in total based on the total weight of the composition. R-(O-Alk)-O-R'(I) where R and R 'are each independently Cto Chydrocarbon group; N is an integer from 1 to about 100; and Alk is a linear (Cto C) alkylene group.SELECTED DRAWING: None【課題】所望の明色化を達成することを可能にし、使用し適用しやすく、特に混合物が流れず、適用箇所に局所的にしっかり留まるように改善された染色特性を示す、特に毛髪などのケラチン繊維を染色するための組成物の提供。【解決手段】i)式(I)で表されるポリオキシアルキレン化脂肪アルコールの非イオン性エーテル。ii)脂肪物質、iii)場合によっては、i)以外の界面活性剤、iv)少なくとも1つの直接染料及び/又は少なくとも1つの酸化染料、v)場合によっては、塩基性化剤、vi)場合によっては、化学的酸化剤を含み、前記脂肪物質含量が、組成物の総重量に対して合計で少なくとも25重量%である組成物。R-(O-Alk)n-O-R'(I)[R及びR'は、各々独立にC10~C30炭化水素基;nは1~約100の整数;Alkは、直鎖の(C1~C6)アルキレン基]、【選択図】なし