Stan Gosnell wrote:


The Jepp charts are very readable under green light, not so good under
red. Blue ink under red light washes out, but under green it appears
black. I haven't found a color except for green that isn't very visible
using green light.


The major key to map visibility and not ruining your night vision isn't
so much color as DIM. Oddly, the best and handiest source I've found
for reading charts at night is to use the backlight from my portable GPS
as the map light. It makes a large area, dim illumination that doesn't
mess up the colors.