If you want to create new theme for your SLD .

On  Main Screen  Click on “New”  button .

Click on Theme Master Menu .

Fill in the required details of Theme Master .  Click on to “Save” button.

Already four theme are created in master Database  you can use any one.

Note: After Selecting  theme your meter color will be just like your theme. you can see in above screen our theme has four different type .theme is collection of your controls and meter with it’s color combination .

Click on “Select”  in your Theme master listview you can “Update “ or “Delete” your Theme.