below the raw histogram there are five counters showing RGB and luminance values. The green counter is to bright to be comfortably viewed on the default GTK background (#dcdad5). Take a look at the attached screenshot (original is the lower one). If you decompose the image to the LAB space there is hardly any difference in the L (which is most significant to human visual system) channel between the green counter and the background.
Too bright green counter, #00b000 is better
Moved to Feature Requests.
Regards,
Niels Kristian