A method of treating a polyester and/or nylon-comprising textile, the method comprising the steps of (i) treating the textile with an aqueous solution comprising a laundry care adjunct and from 1ppb to 500ppm of a thiophene azo carboxylate dye; and (ii) rinsing and drying the textile, the dye comprising a dye having a structure of Formula I: wherein R 1 and R 2 are independently selected from [(CH 2 CR'HO) x (CH 2 CR"HO) y Q], C 1 - 12 alkyl, C 6 - 10 aryl, C 7 -C 22 aryl alkyl, with the requirement that at least one of R 1 and/or R 2 is [(CH 2 CR'HO) x (CH 2 CR"HO) y Q], wherein R' is selected from the group consisting of H, C 1-4 alkyl, CH 2 O(CH 2 CH 2 O) z Q, phenyl and CH 2 OR 5; wherein R" is selected from the group consisting of H, C 1-4 alkyl, CH 2 O(CH 2 CH 2 O) z Q, phenyl and CH 2 OR 5; wherein 1 or 2 ≤ x + y ≤ 50, preferably x + y ≤ 25, more preferably x + y ≤ 10; wherein y ≥ 1; wherein z = 0 or 1 to 20 preferably 0 to 10 or 5; and wherein Q is selected from the group consisting of H and Y wherein Y is as defined below; with the proviso that the dye comprises at least one Q group that is Y; each R 5 is selected from the group consisting of C 1 -C 16 linear or branched alkyl, C 6 -C 14 aryl and C 7 -C 16 arylalkyl; preferably R 5 is selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, t-butyl, hexyl, 2-ethylhexyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, phenyl, benzyl, 2-phenylethyl, naphthyl and mixtures thereof; and wherein Y is an organic radical represented by Formula II wherein independently for each Y group, M is H or a charge balancing cation; m is 0 to 5, preferably 0, 1, 2 or 3; n is 0 to 5, preferably 0, 1, 2 or 3; the sum of m + n is 1 to 10, preferably 1, 2 or 3; each R 8 is independently selected from the group consisting of H and C 3-18 or C 4 -C 18 alkenyl, and wherein at least one R 8 group is not H. wherein R 1 and R 2 are independently selected from [(CH 2 CR'HO) x (CH 2 CR"HO) y Q], C 1 - 12 alkyl, C 6 - 10 aryl, C 7 -C 22 aryl alkyl, with the requirement that at least one of R 1 and/or R 2 is [(CH 2 CR'HO) x (CH 2 CR"HO) y Q], wherein R' is selected from the group consisting of H, C 1-4 alkyl, CH 2 O(CH 2 CH 2 O) z Q, phenyl and CH 2 OR 5; wherein R" is selected from the group consisting of H, C 1-4 alkyl, CH 2 O(CH 2 CH 2 O) z Q, phenyl and CH 2 OR 5; wherein 1 or 2 ≤ x + y ≤ 50, preferably x + y ≤ 25, more preferably x + y ≤ 10; wherein y ≥ 1; wherein z = 0 or 1 to 20 preferably 0 to 10 or 5; and wherein Q is selected from the group consisting of H and Y wherein Y is as defined below; with the proviso that the dye comprises at least one Q group that is Y; each R 5 is selected from the group consisting of C 1 -C 16 linear or branched alkyl, C 6 -C 14 aryl and C 7 -C 16 arylalkyl; preferably R 5 is selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, t-butyl, hexyl, 2-ethylhexyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, phenyl, benzyl, 2-phenylethyl, naphthyl and mixtures thereof; and wherein Y is an organic radical represented by Formula II wherein independently for each Y group, M is H or a charge balancing cation; m is 0 to 5, preferably 0, 1, 2 or 3; n is 0 to 5, preferably 0, 1, 2 or 3; the sum of m + n is 1 to 10, preferably 1, 2 or 3; each R 8 is independently selected from the group consisting of H and C 3-18 or C 4 -C 18 alkenyl, and wherein at least one R 8 group is not H.