Exercise: Colours into tones 1

For this exercise I had to use an image that had strong contrasting colours and use the channel sliders in Photoshop to create two opposite versions of the image in black and white.

The original image had green and red as the contrasting colours.

Original image

For this image I darkened the greens and lightened the reds.  

In this image I did the reverse and lightened the greens and darkened the reds.  

These images demonstrate the effects of adjusting the contrasting colours for an extreme conversion.  

However, to look at the effects of extreme conversion I have also looked at the following images with the colours red and yellow. I think the effects can be seen more clearly with this composition and colour palette.

Original colour version

Decreased red and increased yellow

Darkened reds and lightened yellow