CGA used 2/3 brightness (#AA) for the primary colors, then added 1/3 gray (#555555) if the intensity bit was set. The exception is that with low intensity, yell

CGA used 2/3 brightness (#AA) for the primary colors, then added 1/3 gray (#555555) if the intensity bit was set. The exception is that with low intensity, yellow is turned into brown by reducing green to 1/3 (#AA5500). Unfortunately a lot of terminal emulators get it wrong, the normal colors are too dark and the intensified ones are too saturated! I also remember blue being easier to see in the past, but that is likely my eyes getting worse.