How to change color swatch of colored greyscale pictures using ExtendScript in InDesign?
<p>I've got the following problem/situation:</p>

<ul>
<li>12-page document (ID CC 2015)</li>
<li>one frame with a greyscale picture per page </li>
<li>the pictures are colored with the same color swatch (e.g. "universal") on all pages (white arrow, applied color swatch)</li>
</ul>

<p>What I want to do now, is to write a script to color every picture with a different color swatch, e.g. the picture on page 1 with color swatch "1", the picture on page 2 with color swatch "2" etc. 
But I don't know how to access the picture itself (instead of the frame) and change its color. Is this even possible?</p>

<p>Thanks in advance.</p>