How do you change all the same colours in an image

Miscellaneous Forums/General Discussion/How do you change all the same colours in an image

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puki
 #1
Take nVidia's logo:



If I want to change the green bit to blue - how do I do it - I mean change it to blue, whilst retaining the shading?

I assume you can do it in code by looking for colours that have high ratings in RGB green - I assume you flip the values of Green to Blue - but how do you isolate exactly which ones you want to alter?

I have PaintShop Pro - can it do this for me?