Re: [Gimp-user] exchange color range to change tint

[Steve Kinney <admin pilobilus net>]

On 12/18/2017 10:38 AM, ottenm wrote:
> rich404!  Can't thank you enough!
>
> Here's the steps I'm following:
>
> Colors > Desaturate > Luminosity
> Layer > New Layer > Transparency
> Select foreground color > bucket fill
> Window > Dockable Dialogs > Layers > adjust opacity and mode for this layer
> (both at the top) to:
>    Overlay, Screen, Addition, Hard light, Grain merge
>
> Great results overall.  Struggling to create some brighter spheres as the
> desaturated originall image is very dark/black (so even if I foreground a bright
> color, it darkens significantly as I bring in the other layer).  Have tried
> tweaking the brightness and contrast on the desaturated original, but the
> reflection spots blur and loose definition.
>
> Still, had none of that in my original question and your answer really helped. 
> Would never have found it on my own.  Thank you!

Here's another function to check out:  Open your original image and
switch on the Hue/Saturation tool.  Click on the image and in the
toolbox that opens, give the Hue slider a try.  It seems to do a very
good job here, with the first sample image you provided.

:o)