Hi Marga,
To follow and complete the explanation from François, i propose you to have a glance at this colors wheel :
You can find a tutorial (in french) on the site of Cath :
http://catland.chez.tiscali.fr/graphofi ... oto_01.htm
In few words :
- you can attenuate a color like in the last post of François.
- you can also use this wheel to quickly find the right inverse color to increase an other hue.
For more precision in the color choice, you can open this picture with PF and select
inverse of the right color with the pipette.
- Ctrl Tab and you are back on your first picture
- Menu Filter/Colour/Colored filter and you can select the foreground color of the pallet.