But, they are not exactly matched. This helps to single out individual scan lines. Sometimes also, a given detector will experience a fluctuation in response from its normal mode, so that the line can be notably lighter or darker in its overall feature variations than its neighboring two lines. But, at the least you should have found Trenton, New Jersey. But, it best shows the silt in the ocean waters.
Vegetation appears in the darkest gray tones.
These tones emphasize the ridges in the upper left of this band image. Band 6 is dominated by light tones, indicating that highly reflective vegetation is widespread. The dark patches are urban areas. Water in this Band, and 7, is extremely dark, as expected from its reflectances near zero. Band 7 is marked by even lighter tones.