Can I have Renpy change specific colors to a specific palette?

[GraymatterSandvich]

I'm not sure if I worded that correctly, but basically I want to Renpy look for specific colors, and change them to a different one based on the users choice. What I'm working on is pixel art, so it doesn't have a gigantic palette of blurry colors to have to change, just, like, five.

The goal would be that the user could, say, choose between pink hair and blue hair. If the user chooses blue hair, the game automatically changes any picture with the hex code #FF00DC (A bright obnoxious pink), and changes it into #66BFFF (A light, sky blue). It would also have a few other colors for the highlights and darker parts of the hair. Is this at all possible or is there a different way to go about this? I'm sorta new to coding with Renpy, so I don't really know how to do this (or if it's even possible).

Basically, something like this.

[jeffster]

1. Ren'Py has simple tools to re-color images, e.g. with different tints:
https://renpy.org/doc/html/matrixcolor.html

But with that method I don't know how to replace only a few specific colors without affecting other colors.

2. However it is possible to split images into parts and affect only some of those parts.
To show images consisting of several parts, see e.g. "layered image":
https://renpy.org/doc/html/layeredimage.html
or "Composite":
https://renpy.org/doc/html/displayables.html#Composite
For example, if there is a set of different wigs, a character can be shown with any of them.

3. In such cases developers often use pre-made pics rather than recolor them at runtime.

4. Changing individual colors can be possible using shaders.
(I've no idea what I'm talking about).
See "Model-Based Rendering"
https://renpy.org/doc/html/model.html