Use a better colour scheme for code blocks in WebServices documentation pdf

The webservices pdf available here http://www.jboss.org/jbossas/docs/6-x/Component-Documentation/web-services.html has a very bad colour scheme for code listing (attached image). A better colour scheme would help.

The pdfs of other sections (like Security) look fine.

P.S: It probably would be better to have a uniform colour scheme for all these pdfs.