Looking at Luminosity

Looking at Luminosity
This is the exposure of a colour. The control image is in the middle.

We can see the affect when moving the luminosity slider hard left. The histogram also moves to the left and the blue is much darker and underexposed. The saturation hasn’t changed though and the blue is quite flat and dull.

When moved to the right the blue becomes lighter and washed out. The histogram reflects this also.

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