A leather-like sheet including: a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond; and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet further includes a polyhydric phenol derivative having anionic properties, or the fiber structure is disclosed. Also disclosed is a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond, or a leather-like sheet including the fiber structure and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet has a color difference (E) before and after a moist heat treatment, determined when subjected to the moist heat treatment at 80 C. and a humidity of 90% for 48 hours, of E2.

A leather-like sheet including: a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond; and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet further includes a polyhydric phenol derivative having anionic properties, or the fiber structure is disclosed. Also disclosed is a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond, or a leather-like sheet including the fiber structure and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet has a color difference (E) before and after a moist heat treatment, determined when subjected to the moist heat treatment at 80 C. and a humidity of 90% for 48 hours, of E2.

A colored fiber excellent in heat generation suppression property and fastness is provided. A method for manufacturing a colored fiber, and a fiber product is also provided. The colored fiber includes a fiber and a compound expressed by Formula (1) below.

##STR00001##

A colored fiber excellent in heat generation suppression property and fastness is provided. A method for manufacturing a colored fiber, and a fiber product is also provided. The colored fiber includes a fiber and a compound expressed by Formula (1) below.

##STR00001##