These are recurring question so I try to answer it here:

• How can we make a colored QR Code?
• How can we make a QR Code for printing, PDF would be good?

The answer is: go check out QR Code Image:

You can generate QR-Code image with a simple URL and refine display through different parameters for visual adaptation.

Image URL

To hotlink an image, a set of RewriteRules have been defined:

• http://qrcode.kaywa.com/code/2029998765 : Output = PNG, Size = 4, content = 2029998765, blackness = 0 (black)
• http://qrcode.kaywa.com/code/4/2029998765 : Output = PNG, Size = 4, content = 2029998765, blackness = 0 (black)
• http://qrcode.kaywa.com/code/8777777/2029998765 : Output = PNG, Size = 8, content = 2029998765, foreground color: #777777
• http://qrcode.kaywa.com/code/f8777777/2029998765 : Output = PDF, Size = 8, content = 2029998765, foreground color: #777777
• http://qrcode.kaywa.com/code/5888888ff0000/2029998765 : Output = PNG, Size = 5, content = 2029998765, foreground color: #888888, background color: #ff0000
• http://qrcode.kaywa.com/code/5tttttt/2029998765 : Output = PNG, Size = 5, content = 2029998765, foreground color: (black, default), background color: transparent

Note (transparency "tttttt" is only supported on PNG image, and only on the background).


Non-rewritten URL
http://qrcode.kaywa.com/img.php?b=BBBBBB&w=FFFFFF&s=SIZE&t=TYPE
&d=DATA

Where:

• BBBBBB is the foreground color, in HTML/Hex format. Defaults to 000000 (black)
• FFFFFF is the background color, in HTML/Hex format. Defaults to ffffff (white)
• SIZE is the module size: 1-10
• TYPE is the output image type: f for PDF, p for PNG
• DATA is the actual data (URL-ENCODED!)

Decoding with other 2D Barcode Readers

To allow other 2D Barcode Readers than the Kaywa Reader to decode generated
QR-Code you cannot use short code (ex. 2020400193). Instead you
must add the link http://d.kaywa.com/ before the DATA. Here is an example:

http://d.kaywa.com/2029998765


which gives you


http://qrcode.kaywa.com/img.php?s=5&d=http%3A%2F%2Fd.kaywa.com%2F2029998765

Generated QR-Code image will be bigger as more data is encoded.