Yes, a red pen is good for manifesting if you want to manifest energy.
The color of the pen you use can be chosen based on what you are trying to manifest:
- Red: Energy
- Orange: Creativity
- Yellow: Confidence
- Green: Abundance and Health
- Blue: Wisdom
- Purple: Intuition
- Pink: Love and Kindness
- White or Silver: Moon Cycles and Purity
- Black: Protection