Luftwaffe propeller blades definitely did not have a coloured tip as standard, to see them would be very unusual. They were finished in an all over RLM 70 colour, usually described as 'Schwarzgrun' or black-green. Something often missed is the 30 mm unpainted band at the base of each propeller. It was not always present, but you will see it in photographs, even late in the war. The relevant instruction states.
"When spraying previously unbalanced propeller blades, care must be taken that a strip 30mm wide above the edge of the spinner is not sprayed so that the mark for blade adjustment remains visible."
Like this:
British propeller blades always had a yellow tip. Air Ministry Orders state.
"Propellers are finished by the propeller manufacturer in accordance with the relevant specification. Should it be necessary to refinish a propeller in service the paint usually used is 'night', with a 4 in. yellow band covering the complete tip of each blade."
Hope that helps!
Cheers
Steve