Colour of pH paper when dipped in river water?

The pH of river water is the measure of how acidic or basic the water is on a scale of 0-14. It is a measure of hydrogen ion concentration. U.S. natural water falls between 6.5 and 8.5on this scale with 7.0 being neutral. The optimum pH for river water is around 7.4. Therefore, the color of pH paper dipped in river water would be a yellowy green around the pH of 7.4.