The color.toString() function in D3.js is used to return a string representing the color according to the CSS Object Model specification. Syntax:
color.toString()
Parameters: This function does not accept any parameters. Return Value: This function returns a string representing the color according to the CSS Object Model specification. Below programs illustrate the color.toString() function in D3.js: Example 1:Â
javascript
<!DOCTYPE html><html>Â
<head>Â Â Â Â <title>color.toString() function</title>Â
</head>Â
<body>    <script>                 // Calling the d3.color() function function        // with some parameters        var color1 = d3.color("red");        var color2 = d3.color("green");        var color3 = d3.color("blue");                 // Calling the color.toString() function        var A = color1.toString();        var B = color2.toString();        var C = color3.toString();                 // Getting the string representing        console.log(A);        console.log(B);        console.log(C);    </script></body>Â
</html> |
Output:
rgb(255, 0, 0) rgb(0, 128, 0) rgb(0, 0, 255)
Example 2:Â
javascript
<!DOCTYPE html><html>Â
<head>Â Â Â Â <title>color.toString() function</title>Â
</head>Â
<body>    <script>                 // Calling the d3.rgb() function        // without some parameters        var color = d3.rgb();                 // Calling the color.toString() function        var A = color.toString();                 // Getting the string representing        console.log(A);    </script></body>Â
</html> |
Output:
rgb(0, 0, 0)
Reference: https://devdocs.io/d3~5/d3-color#color_toString
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