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pdfcolorstransparency
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Reputation: 17345

Create a transparent color in PDF

I'd like to create a transparent color in PDF (directly, no external software). I know for example with x y z rg x y z RG I can set the rgb color values for stroking and non-stroking operations. How do I create a transparent color? A link to the correct search terms in the pdf spec would be a great help.

Upvotes: 2

Views: 2090

Answers (1)

Aaron Digulla
Aaron Digulla

Reputation: 328604

Transparency in PDF is a property of objects, not colors (Wikipedia).

The Wapedia contains a description of the PDF file format. See Section 3.2.4. for "details" on transparency. Like all other resources on the web, they are mostly superficial.

I suggest to use a tool from Adobe to create the four forms of transparency and examine the result.

Upvotes: 1

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