What Colour pen is best for studying?

What Colour pen is best for studying? Low wavelength colors promote restfulness and calm, and they improve efficiency and focus. So that’s why green is an excellent color for improving concentration. Apart from being one of the easiest colors on the eyes, it reminds us of nature.

Low wavelength colors promote restfulness and calm, and they improve efficiency and focus. So that’s why green is an excellent color for improving concentration. Apart from being one of the easiest colors on the eyes, it reminds us of nature.