You can change the style color of your html content on the server side or on the client side.
elementId html- ( , )
uiwebview ( ) javascript :
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString *javascripString = [NSString stringWithFormat:@"document.getElementById(\"linkId\").style.color=\"white\";", m_studyId];
[uiwebview stringByEvaluatingJavaScriptFromString:javascripString];
}