A Venn diagram rendered as a single SVG displays two overlapping blue circles on a white background, with a thin black border around the canvas and a title label above. The primary circle is filled with a light blue color and smoothly transitions to a darker blue on hover via a CSS `transition` on the `#blueCircle` element. Two smaller, unfilled circles outlined in white are positioned over the main circle to suggest intersection regions, though no data values or set labels are encoded. The example uses raw SVG elements (`circle`, `rect`, `text`) with no external JavaScript libraries, and its source is credited to the DataViz Catalogue.