If you're using a monitor with separate brightness and contrast settings, you might also choose to lower the contrast a bit. When my monitor's contrast is at 75

If you're using a monitor with separate brightness and contrast settings, you might also choose to lower the contrast a bit. When my monitor's contrast is at 75%, white doesn't really get less bright until somewhere around 30% brightness. But I'd I lower contrast to 50%, then 50% brightness makes a bigger difference, without losing readability.