2003 Ford Ranger Noticed a couple of drops of coolant on dr

Recently, I noticed that my overflow reservoir was a couple of inches below "min". I brought it up to "min". It appears that since then - when I stop the truck and park - I will see a couple of drops of what appears to be coolant on the ground. The drops are not warm or hot - they feel like ambient temperature. After a couple of days - the reservoir is back to slightly below "min" and I did not notice any drips today. The drips are not where I would normally expect to see the A/C condensation drips. I would assume that any relevant drips after 30 minutes of running should be warm? The color is between clear and orange/yellow - which appears to be close to the color in my reservoir. The drips are approx. In the middle of the front of the truck approximately 2 feet from the front and mostly centered across the front. I never noticed this problem until I brought the reservoir back to "min". Thank you.