I want to convert an image to indexed colors using something like 3 to 10 colors.
I got that step.

Now i am onto getting these indexed colors so that i can select by color tool each one of the colors one by one to perform a function (hatching script i created).
which functions should i be looking at?

At some point before calling my function (hatching script) I have to convert back into RGB to use other color values, i'll have to manually calculate the RGB values.

Any help is appreciated.
Thanks in advance.

I tried

but it's giving me error on gimp-palette-get-colors about "Error: ( : 1) Invalid type for argument 1 to gimp-palette-get-colors"
also what's weird if i run the script again it's complaining that the image is already in indexed mode
but the image doesn't seem to be converted ..but if i switch to indexed mode manually nothing happens and if i manually convert back to RGB then it shows it indexed colors (5 colors in this example) its' as if my errors on getting the palette has left gimp confused between these modes.

All values returned from PDB functions are in the form of a list. In this case, the palette name is the first item in that returned list.

thanks a lot...i'll try it.

I couldn't get your code to work i had to use a while loop but it works thanks for pointing me to colormap.

I see where you are going and if I were you I would use the technique I used in my luminosity-tiler script:
- Make a stack of layers, one per hatching, stacked in order of apparent luminosity (say, dark at bottom)
- Each layer (except bottom) get a layer mask which is a grayscale version of the original image
- Each layer mask is thresholded with progressive threshold, the topmost having a mask that makes only the very light parts opaque.

You get a much finer control on the hatching<->luminosity that way (a user can even replace a mask after the script has run to fix pathological cases...)

thanks.
I might look into it..right now it does create separate layers for each hatch, but instead of creating a mask i just did the obvious way to me which was to cut away the unneeded parts.

There should've been an additional right parenthesis ")" at the end of the following line.

(let loop ((colors color-map)