Quinonoid dyestuffs containing the tris(trimethylsilyloxy)silylalkylamino group, --NH--(CH.sub.2).sub.x --Si[OSi(CH.sub.3).sub.3 ].sub.3 are produced of the formula ##STR1## WHEREIN EACH R.sup.2 and R.sup.3 individually is hydrogen, hydroxyl or ##STR2## x is 1 to 6, n and m are independently 0 or 1 and n .ltoreq. m and provided that when n = 0 and m = 1 R.sup.3 is hydrogen and that when n and m are both 0 one each of R.sup.2 and R.sup.3 is hydrogen and at least one R.sup.3 or R.sup.2 is ##STR3## and are found to be compatible with cured silicone polymers.