Make jenkins use White on Black text in the console. Use with the Chrome Stylish extension to apply to your instance of Jenkins. -- https://chrome.google.com/webstore/detail/stylish-custom-themes-for/fjnbnpbmkenffdnngjfgmeleoegfcffe?hl=en

gistfile1.txt

pre.console-output {
    font: "Lucida Console", Monaco, monospace;
    font-size: 11pt;
    color: white;
    background-color: black; 
    padding: 0.5em; 
}

span.timestamp { 
    color: #888;
}

.console-output a {
    color: #AAF !important;
}