Looking at your wagon and at the 1970 Paint Code Chart for Chevrolet, I'm going to say the paint color appears to be #50, "Yellow Beige". That's the closest I can get , allowing for fading over time.
Only way to know for sure what color would be to get the paint code off the tag and correspond it to a paint chart from t hat year. Noticed theres a little overspray on the spare tire well not sure if that was something that happened in factory or after??
Here is a decoder for the cowl tag. You should be able to pull the paint code from that. https://www.tpocr.com/chevybp10.html