I don't think/can't remember if I ever directly added tomato paste to the sauce. Like Someday, I "painted" the bones with it during the roasting process or added it to the mirepoix during the sweating process (prior to the flour)but......
Anywho, 15oz seems to be a tad too much. Anytime I've made it (granted it has been a long time since the last) the color is a nice light golden brown but but can't say I ever saw orange.
I wouldn't say it's ruined but...... Could call it a Tomato/veal Demi