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Defines the handles fill options.

<div id="diagram"></div>
<script>
$("#diagram").kendoDiagram({
    shapes: [
      { id: "1", x: 100, y: 100, content: { text: "Shape 1" } },
      { id: "2", x: 300, y: 100, content: { text: "Shape 2" } }
    ],
    connections: [{
      from: "1",
      to: "2",
      selection: {
        handles: {
          fill: "#ff6358"
        }
      }
    }]
});
</script>

Defines the handles fill color.

<div id="diagram"></div>
<script>
$("#diagram").kendoDiagram({
    shapes: [
        {
            id: "1",
            content: {
                text: "State 1"
            },
            x: 20,
            y: 20
        },
        {
            id: "2",
            content: {
                text: "State 2"
            },
            x: 200,
            y: 20
        }
    ],
    connections: [
        {
            from: "1",
            to: "2",
            selection: {
                handles: {
                    fill: {
                        color: "red"
                    }
                }
            }
        }
    ]
});
</script>