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How to find the alpha channel transparency value of a pixel in a png image?

Asked 2010-01-25T11:42:05.253
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I have an image that has alpha channel transparency.

I want to recreate the same background color with RGBA values in CSS but I can not find the real color of the background pixels and their alpha channel value. if I use any sort of color picker it will give me the absolute value of the pixel color which is relevant to its background color.

Do you know any trick to find out the real alpha channel value of a pixel?

css image transparency photoshop
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use the absolute colour and adjust the transparency in photoshop until it looks right and then use that percentage as your value.

answered 2010-01-25T11:54:35.150

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