Exercise: Primary and Secondary Colours

I took three exposures of each of the primary and secondary colours. One exposure as suggested by the light meter in my camera and then one exposure a stop higher, and one a stop lower than the original suggested.

1/25sec -  f/10, f/11. f/13
Here i would say the middle exposure, f/11 , as suggested by the camera, is the closest match to the yellow on the colour wheel

1/25sec - f/7.1, f/8. f/9
The last exposure here, f/9 appears to be the truest match to the purple present on my colour wheel. A stop above the suggested.

1/10 sec - f/6.3, f/7.1, f/8
The red on this fence was never a true bright red, however, the last exposure, f/8 appears to make the red seem brightest and boldest that more similar to the red on the colour wheel.

1/20 sec - f/10, f/11, f/13
The last exposure, f/13 i would say is the best match for the colour orange.

1/6 sec - f/5.6, f/6.3. f/7.1
The green in all these photographs appears extremely similar, however i would have to say i favour the last exposure.

1/15 sec - f/16, f/18, f/20
My favourite exposure from this set would be the last one, at f/20, as it is quite a bold blue and is quite matte looking. The other two exposures, especially f/16 reflect quite a bit of light, making the blue of the bridge have a bit of a white tint to it, not looking quite as blue as the last exposure.