D3.js schemeRdYlBu[] Function

Last Updated : 19 Aug, 2020

The d3.schemeRdYlBu[] function in D3.js is used to return a particular color from the “RdYlBu” sequential color scheme which is returned as a HEX string.

Syntax:

d3.schemeRdYlBu[k]

Parameters: This function accepts a single parameter as mentioned above and described below:

k: “k” is a number.

Return Values: It returns a HEX string.

Below examples illustrate the d3.schemeRdYlBu[] function in D3.js:

Example 1:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent= 
        "width=device-width,initial-scale=1.0" /> 
  
    <title>D3.js schemeRdYlBu[] Function</title> 
  
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
    <script src= 
        "https://d3js.org/d3-color.v1.min.js"> 
    </script> 
    <script src= 
        "https://d3js.org/d3-interpolate.v1.min.js"> 
    </script> 
    <script src= 
        "https://d3js.org/d3-scale-chromatic.v1.min.js"> 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">GeeksForGeeks</h1> 
  
        <h3>D3.js schemeRdYlBu[] Function</h3> 
  
        <script> 
            document.write(d3.schemeRdYlBu[3][0] + "<br>"); 
            document.write(d3.schemeRdYlBu[3][1] + "<br>"); 
            document.write(d3.schemeRdYlBu[3][2] + "<br>"); 
            document.write(d3.schemeRdYlBu[4][1] + "<br>"); 
            document.write(d3.schemeRdYlBu[4][2] + "<br>"); 
            document.write(d3.schemeRdYlBu[4][3]); 
        </script> 
    </center> 
</body> 
  
</html> 

Output:

Example 2:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent= 
        "width=device-width,initial-scale=1.0" /> 
  
    <title>D3.js schemeRdYlBu[] Function</title> 
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
    <script src= 
        "https://d3js.org/d3-color.v1.min.js"> 
    </script> 
    <script src= 
"https://d3js.org/d3-interpolate.v1.min.js"> 
    </script> 
    <script src= 
"https://d3js.org/d3-scale-chromatic.v1.min.js"> 
    </script> 
</head> 
<style> 
    div { 
        padding: 10px; 
        width: fit-content; 
        height: 100px; 
    } 
</style> 
  
<body> 
    <center> 
        <h1 style="color:green;"> 
            GeeksForGeeks 
        </h1> 
  
        <h3>D3.js schemeRdYlBu[] Function</h3> 
  
        <div class="b1"> 
            <span> 
                D3.schemeRdYlBu[9][0] 
            </span> 
        </div> 
          
        <div class="b2"> 
            <span> 
                D3.schemeRdYlBu[3][1] 
            </span> 
        </div> 
  
        <script> 
            // Array of colors is given  
            let color1 = d3.schemeRdYlBu[9][0]; 
  
            let color2 = d3.schemeRdYlBu[3][1]; 
  
            let b1 = document.querySelector(".b1"); 
            let b2 = document.querySelector(".b2"); 
            b1.style.backgroundColor = color1; 
            b2.style.backgroundColor = color2;  
        </script> 
    </center> 
</body> 
  
</html> 