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Verifique as configurações avançadas da sua placa gráfica. Se houver uma opção Saturation disponível, tente defini-la como 0 (zero).
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Eu não sei se isso permite B & B puro ou não, mas algo como Screen Tinter pode ajudá-lo. Aqui está a descrição:
Some individuals with apparently normal eyesight, experience discomfort when viewing computer screens. Some report that the words appear to move, wobble or flicker while others say that the screen appears too bright or the words are too close together.
This condition is referred to as Meares-Irlen syndrome. Those affected by the condition may skip words or lines when reading. Others report eyestrain or headaches after reading.
In some cases these symptoms can be relieved by changing the screen colours.
This can be achieved by changing the Windows Display Properties. However, this process is cumbersome and counter-intuitive.
Screen Tinter is a free utility which allows the screen foreground and background colours to be changed at the click of a button.