Adjusting colours with Gimp
Open the ‘Gimp’
Open the file ‘neil here.xcf’
In the ‘Layers Window’ select the layer that you would like to
change the colour of.
Use the sliders to change how bright the image is.
Contrast means how much difference there is between the bright and the dark colours.
When you are happy with the change, press ‘Enter’ on the keyboard.
Go to ‘colours/hue-saturation’ to change what colour the image