Deleting colors from a forced color palette in Photoshop

This is a very specific topic, but it was hard to find information about it online, so I’ll post my findings here.

If you want to force a certain color palette on your image in Photoshop you can choose

Image –> Mode –> Indexed Color.

A window will pop up where you can choose a palette. If you want to create your own palette in which you select all the colors, you can do this:

Set the palette to “custom”. A color table window will open. You can delete existing colors by ctrl-clicking on them. You can add more colors by clicking an empty color slot and picking a color for it.

Here’s a quick gif-like video of creating custom color tables (ACT-files) in Photoshop and saving them for later use:

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