Part THREE: Colour -- Exercise: Control the strength of a colour

Using tripod with ISO 100 constant, I took a photo of a painted door which has dark red in colour.

The images were taken in one late afternoon at about 6pm. The painted door was under a cloudy evening sky so the colour itself appeared normal and not too bright comparing to if I had taken during a bright sunny day.

a) f/5.6 1/15 sec
produced the strongest colour
The Brightest area: where the lightest paint appear on the surface
R=114, G=14 and B=12
The darkest area: where the paint is accumulated
R=20, G=16 and B=13


b) f/5.6 1/8 sec
This colour of this image looks closest to the real colour. I think the main reason is that camera will try to average the tone out.
The Brightest area: where the lightest paint appear on the surface
R=170, G=38 and B=26
The darkest area: where the paint is accumulated
R=48, G=24 and B=24



c) f/5.6 1/5 sec
average setting which looks lighter in colour to the real one.
The Brightest area: where the lightest paint appear on the surface
R=216, G=74 and B=72
The darkest area: where the paint is accumulated
R=66, G=31 and B=38
or
R=74, G=19 and B=23


d) f/5.6 1/2 sec
The Brightest area: where the lightest paint appear on the surface
R=255, G=142 and B=155
The darkest area: where the paint is accumulated
R=105, G=35 and B=45


e) f/5.6 1 sec
This image looks like a "washed out" colour, pale and colour nearly disappeared.
The Brightest area: where the lightest paint appear on the surface
R=255, G=195 and B=204
The darkest area: where the paint is accumulated
R=169, G=78 and B=93


Summary:
1)The higher the exposure, the brighter the colour and the RGB value is approaching 255 which means the overall colour is approaching "white"
2)The lower the exposure, the darker the colour and the RGB value is approaching 0 which means overall colour is approaching "black"