I recently attended a conference where the presenter was using a whiteboard marker to explain and most of the times the items he drew or wrote on the board were not visible due to the lack of ink in the marker. I just interrupted and asked him to use a bright colored marker so that the items are visible.
One of my colleagues corrected me saying that I should have asked for "dark color" instead of bright color.
Having said that, I am really confused on the contextual usages of bright and dark and I would be really grateful if someone clears this for me.