Your dashboards are beautiful just the way they are, and being beautiful on the inside is all that matters.
On a serious note, what you're asking is akin to, how do I make my house more attractive. You need to understand what you want to deliver from a UI point of view and build on that. If you cant edit CSS, you're very much limited to what we expose via Simple XML, and therefore im going to recommend you start here : http://docs.splunk.com/Documentation/Splunk/6.5.1/Viz/PanelreferenceforSimplifiedXML .
Your dashboards are beautiful just the way they are, and being beautiful on the inside is all that matters.
On a serious note, what you're asking is akin to, how do I make my house more attractive. You need to understand what you want to deliver from a UI point of view and build on that. If you cant edit CSS, you're very much limited to what we expose via Simple XML, and therefore im going to recommend you start here : http://docs.splunk.com/Documentation/Splunk/6.5.1/Viz/PanelreferenceforSimplifiedXML .
