Lab value of a pixel

Hello, how can i have access of a lab value of a pixel from the active document? i need it to create a function that find the darkest pixel, thank you

You could try: https://developer.adobe.com/photoshop/uxp/2022/ps_reference/media/imaging/#getpixels

I am not 100% how is the support of other color modes there is an option for it… but maybe grayscale could be the way to go.

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thank you @Jarda for your helkp