D3.js schemeDark2 方法

D3.js中的d3.schemeDark2方法用于返回一个由八种颜色组成的数组，该数组以 RGB 十六进制字符串的形式返回。

句法：

d3.schemeDark2

参数：此函数不接受任何参数。

返回值：返回一个 RGB 十六进制字符串。

示例 1：

HTML

 
 
 
     
     
    
    
     
    
     
    
     
    
     
 
  
 
    
    GeeksForGeeks
      
    D3.js schemeDark2 Method
      
     
        document.write(d3.schemeDark2[0]+"<br>"); 
        document.write(d3.schemeDark2[1]+"<br>");
        document.write(d3.schemeDark2[2]+"<br>");
        document.write(d3.schemeDark2[3]+"<br>");
        document.write(d3.schemeDark2[4]+"<br>");
        document.write(d3.schemeDark2[5]+"<br>");
        document.write(d3.schemeDark2[6]+"<br>");
        document.write(d3.schemeDark2[7]+"<br>");
     
    
 

输出：

示例 2：

HTML

 
 
 
     
     
    
    
     
    
     
    
     
    
     
   
     
        div { 
            padding: 3px; 
            width: fit-content; 
            height: 20px;
            width: 250px;
        } 
    

   
 
    
    GeeksForGeeks
      
    D3.js schemeDark2 Method
      
     
         
            D3.schemeDark2[0] 
         
     
     
         
            D3.schemeDark2[1]   
         
     
     
         
            D3.schemeDark2[2] 
         
     
     
         
            D3.schemeDark2[3]  
         
     
     
         
            D3.schemeDark2[4] 
         
     
     
         
            D3.schemeDark2[5]  
         
     
     
         
            D3.schemeDark2[6]  
         
     
     
         
            D3.schemeDark2[7] 
         
     
     
        // Array of colors is given 
        let color1 = d3.schemeDark2[0]; 
        let color2 = d3.schemeDark2[1]; 
        let color3 = d3.schemeDark2[2]; 
        let color4 = d3.schemeDark2[3]; 
        let color5 = d3.schemeDark2[4]; 
        let color6 = d3.schemeDark2[5];
        let color7 = d3.schemeDark2[6]; 
        let color8 = d3.schemeDark2[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：