Batch image program to replace 2 colors?

Question

I have a lot of .png images, and I want to replace a color to another color..
Is there a batch program to do that? I'm on Windows 7

Solution

For a single color replacement I suggest you use XnView's batch processing tool:

If you need to replace a range of colors, or use tolerance settings (especially useful for JPEG images where neighboring pixels might have slightly different colors - sometimes imperceptible to the eye), I recommend Batch Images. It's also more user friendly for batch processing:

Disclaimer: I am a frequent user of both XnView and Batch Images.

Comments

[Dave]

You need to update your question and make it clearer with more detail about your issue. Are you changing colours in a palette, in Microsoft/Mac/Linux OS itself or in a specific program?

[TTem]

@DaveRook I updated the question

[Admin]

Do you want to programmatically change one colour for another, in a series of PNG images?

[Timores]

You can actually perform several color remplacements in XnView in a single batch run (with simple X->Y replacements).