Coloring compound and thermal transfer recording sheet

A thermal transfer recording sheet comprising a substrate and a coloring material layer on the substrate,

• wherein the coloring material layer at least includes a yellow dye layer including a yellow dye, a magenta dye layer including a magenta dye, and a cyan dye layer including a cyan dye, and
• the cyan dye includes a coloring compound including a structure represented by Formula (1-1) or (1-2) below:
• where R1 and R2 each independently represent an unsubstituted alkyl group,
• R3 and R4 each independently represent a hydrogen atom, an unsubstituted alkyl group, an aryl group having a substituent, or an unsubstituted aryl group,
• R5 and R6 each independently represent a hydrogen atom or an unsubstituted alkyl group having 1 to 4 carbon atoms,
• R7 and R8 each independently represent an unsubstituted alkyl group having 1 to 4 carbon atoms,
• R9 represents a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group,
• R10 represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group, and
• X− represents an anion,
• where R1 to R8 are the same as R1 to R8 in Formula (1-1),
• R9′ represents a sulfonato group, and
• R10′ represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group.