1. A computer implemented method of dynamically generating cascading style sheets for a client application, comprising: providing a first style sheet containing a noncompliant function to a standard style sheet language according to W3C cascading style sheet specification; retrieving the first style sheet at a client from a server; extracting from the first style sheet the noncompliant function; executing the noncompliant function at the client to produce a function output wherein the noncompliant function transforms a noncompliant color value according to W3C cascading style sheet specification that is operating system specific into a standard style sheet language compliant color value according to W3C cascading style sheet specification; generating a second style sheet based on the first style sheet and the function output, wherein the second style sheet is compliant according to W3C cascading style sheet specification; and executing the second style sheet on a standard style sheet language compliant browser according to W3C cascading style sheet specification at the client.