D3.js schemeOrRd[]函数

D3.js中的d3.schemeOrRd[]函数用于从“OrRd”顺序配色方案中返回特定颜色，该配色方案以 HEX字符串形式返回。

句法：

d3.schemeOrRd[k]

参数：此函数接受如上所述和下文所述的单个参数。

• k： “k”是一个从 3 到 9 的数字。

返回值：它返回一个 HEX字符串。

示例 1：

HTML

 
 
 
     
     
   
    
     
    
     
    
    
    
    
 
  
 
    
    GeeksForGeeks
      
    D3.js schemeOrRd[] Function
      
     
        document.write(d3.schemeOrRd[8][0]+"<br>"); 
        document.write(d3.schemeOrRd[8][1]+"<br>");
        document.write(d3.schemeOrRd[8][2]+"<br>");
        document.write(d3.schemeOrRd[8][3]+"<br>");
        document.write(d3.schemeOrRd[8][4]+"<br>");
        document.write(d3.schemeOrRd[8][5]+"<br>");
        document.write(d3.schemeOrRd[8][6]+"<br>");
        document.write(d3.schemeOrRd[8][7]+"<br>");
     
    
 

输出：

示例 2：

HTML

 
 
 
     
     
   
    
     
    
     
    
     
    
     
  
     
        div { 
            padding: 3px; 
            width: fit-content; 
            height: 20px;
            width: 250px;
        } 
     
 
  
 
    
    GeeksForGeeks
      
    D3.js schemeOrRd() Function
      
     
         
            D3.schemeOrRd[8][0] 
         
     
     
         
            D3.schemeOrRd[8][1]   
         
     
     
         
            D3.schemeOrRd[8][2] 
         
     
     
         
            D3.schemeOrRd[8][3]  
         
     
     
         
            D3.schemeOrRd[8][4] 
         
     
     
         
            D3.schemeOrRd[8][5]  
         
     
     
         
            D3.schemeOrRd[8][6]  
         
     
     
         
            D3.schemeOrRd[8][7] 
         
     
     
        // Array of colors is given 
        let color1 = d3.schemeOrRd[8][0]; 
        let color2 = d3.schemeOrRd[8][1]; 
        let color3 = d3.schemeOrRd[8][2]; 
        let color4 = d3.schemeOrRd[8][3]; 
        let color5 = d3.schemeOrRd[8][4]; 
        let color6 = d3.schemeOrRd[8][5];
        let color7 = d3.schemeOrRd[8][6]; 
        let color8 = d3.schemeOrRd[8][7]; 
  
        let b1 = document.querySelector(".b1"); 
        let b2 = document.querySelector(".b2"); 
        let b3 = document.querySelector(".b3"); 
        let b4 = document.querySelector(".b4"); 
        let b5 = document.querySelector(".b5"); 
        let b6 = document.querySelector(".b6"); 
        let b7 = document.querySelector(".b7"); 
        let b8 = document.querySelector(".b8"); 
          
        b1.style.backgroundColor = color1; 
        b2.style.backgroundColor = color2;
        b3.style.backgroundColor = color3; 
        b4.style.backgroundColor = color4;
        b5.style.backgroundColor = color5; 
        b6.style.backgroundColor = color6;
        b7.style.backgroundColor = color7;
        b8.style.backgroundColor = color8; 
     
    
 

输出：