Exercise: Colours into Tones in Black and White

For this exercise, I took a photograph using the colours red, green, blue and yellow. Using Lightroom I then changed the photograph into black and white and began to add different coloured black and white filters to the photograph.
Here are the results:

Original

Black and white - No filter

Blue filter

Green filter

Yellow filter

Red filter
The blue filter is the only one that stands out dramatically, the colours are a lot bolder and darker than in all the other filters. The contrasts in colours is a lot greater here. It is the only filter in which the yellow pepper does not appear white.
Looking at these different filters, I would say if it was changing a predominantly yellow photograph into black and white, i would be most likely to use a blue filter as it is the only one in which the yellow has any sort of depth or contrast.
Greens i would say are more suited to a red filter and red to a green filter.
It appears the filter which works best for each colour is the complementary/opposite colour on the colour wheel to the colour used within the photograph

I then added an orange filter to see if this was true for the blue background too and it would appear that blue looks best under a filter of its complementary colour, orange.