Thanks all for kind words!
Thomas, this is hard to say what made it slightly olive ... I made three prints on the same paper and only this one has this hue. It is a bit accented here probably due to scanner. I exposed this one fully opened for almost one minute on 12x16i print. Then strongly agitated in highly diluted developer. I had two prints in one tray, second one was on Variant III paper. I used also old brown, but last week I made mistake (have two simillar canisters) and put classical BW multigrade in it also. As real beginner in lith I can say just, I dont know .....