If it was setting over the winter, it may have picked up a little condensate from the iron block heating and cooling with the ambient temperature. Maybe check the coolant level and hydraulic level to see if there is any contamination in the oil or leakage into the oil. If it has not been turned over for a while, any coolant should be at the bottom of the oil pan by the plug. First thing out would be water or coolant if you loosen the plug. If you are uncomfortable about the oil color you could change it, but I would want to know if there was a reason for it before changing the oil.