前言  
 
 调色盘  
它是一组颜色,图形、系列会自动从其中选择颜色, 不断的循环从头取到尾, 再从头取到尾, 如此往复 主要分三种:主题调色盘、全局调色盘、局部调色盘   
 主题调色盘  
echarts. registerTheme ( 'myCustomTheme' ,  { 
        "color" :  [ 
            "#893448" , 
            "#d95850" , 
            "#eb8146" , 
            "#ffb248" , 
            "#f2d643" , 
            "#ebdba4" 
        ] , 
        "backgroundColor" :  "rgba(242,234,191,0.15)" , 
    } ) 
  
 
<! DOCTYPE  html >  
< html  lang = " en" >  
< head>  
    < meta  charset = " UTF-8" >  
    < meta  name = " viewport"   content = " width=device-width, initial-scale=1.0" >  
    < meta  http-equiv = " X-UA-Compatible"   content = " ie=edge" >  
    < title>  ECharts高级-调色盘</ title>  
    
    < script  src = " https://cdn.jsdelivr.net/npm/echarts@5.4.1/dist/echarts.min.js" > </ script>  
    < script  src = " lib/CustomTheme.js" > </ script>  
</ head>  
< body>  
< div  id = ' app'   style = " width :  600px; height : 400px" > </ div>  
< script> 
    
    echarts. registerTheme ( 'myCustomTheme' ,  { 
        "color" :  [ 
            "#893448" , 
            "#d95850" , 
            "#eb8146" , 
            "#ffb248" , 
            "#f2d643" , 
            "#ebdba4" 
        ] , 
        "backgroundColor" :  "rgba(242,234,191,0.15)" , 
    } ) 
    var  mCharts =  echarts. init ( document. getElementById ( "app" ) ,  'myCustomTheme' ) 
    
    var  pieData =  [ 
        { 
            name :  'pass' , 
            value :  80 
        } , 
        { 
            name :  'fail' , 
            value :  10 
        } , 
        { 
            name :  'skip' , 
            value :  5 
        } , 
        { 
            name :  'error' , 
            value :  5 
        } 
    ] 
    var  option =  { 
        series :  [ 
            { 
                type :  'pie' , 
                data :  pieData, 
                label :  { 
                    show :  true , 
                    formatter :  function  ( arg )  { 
                        console. log ( arg) 
                        return  arg. data. name +  '\n'  +  arg. percent +  '%' 
                    } 
                } , 
                selectedMode :  'multiple' ,   
                selectedOffset :  30 , 
                radius :  [ '50%' ,  '80%' ] 
            } 
        ] 
    } 
    mCharts. setOption ( option) 
 </ script>  
</ body>  
</ html>  
  
 
 
 全局调色盘  
全局调色盘:在 option 下增加一个 color 的数组   
var  option =  { 
  
        color :  [ 'red' ,  'green' ,  'blue' ,  'skyblue' ,  'purple' ] 
  } 
  
 
<! DOCTYPE  html >  
< html  lang = " en" >  
< head>  
    < meta  charset = " UTF-8" >  
    < meta  name = " viewport"   content = " width=device-width, initial-scale=1.0" >  
    < meta  http-equiv = " X-UA-Compatible"   content = " ie=edge" >  
    < title>  ECharts高级-调色盘</ title>  
    
    < script  src = " https://cdn.jsdelivr.net/npm/echarts@5.4.1/dist/echarts.min.js" > </ script>  
    < script  src = " lib/CustomTheme.js" > </ script>  
</ head>  
< body>  
< div  id = ' app'   style = " width :  600px; height : 400px" > </ div>  
< script>   
    var  mCharts =  echarts. init ( document. getElementById ( "app" ) ) 
    var  pieData =  [ 
        { 
            name :  'pass' , 
            value :  80 
        } , 
        { 
            name :  'fail' , 
            value :  10 
        } , 
        { 
            name :  'skip' , 
            value :  5 
        } , 
        { 
            name :  'error' , 
            value :  5 
        } 
    ] 
    var  option =  { 
        
        color :  [ 'red' ,  'green' ,  'blue' ,  'skyblue' ,  'purple' ] , 
        series :  [ 
            { 
                type :  'pie' , 
                data :  pieData, 
                label :  { 
                    show :  true , 
                    formatter :  function  ( arg )  { 
                        console. log ( arg) 
                        return  arg. data. name +  '\n'  +  arg. percent +  '%' 
                    } 
                } , 
                selectedMode :  'multiple' ,   
                selectedOffset :  30 , 
                radius :  [ '50%' ,  '80%' ] 
            } 
        ] 
    } 
    mCharts. setOption ( option) 
 </ script>  
</ body>  
</ html>  
  
 
 
 局部调色盘  
局部调色盘:在 series 下增加一个 color 的数组   
 
 说明 :如果全局的调色盘和局部的调色盘都设置了, 局部调色盘会产生效果, 这里面遵循的是就近原则  
  
var  option =  { 
  
   color :  [ 'red' ,  'green' ,  'blue' ,  'skyblue' ,  'purple' ] , 
  series :  [ 
   { 
      type :  'pie' , 
      data :  pieData, 
      
      color :  [ 'pink' ,  'yellow' ,  'black' ,  'orange' ,  'red' ] 
   } 
 ] 
} 
mCharts. setOption ( option) 
  
效果     
 渐变颜色  
线性渐变 
  线性渐变的类型为 linear , 他需要配置线性的方向, 通过 x, y, x2, y2 即可进行配置  x , y , x2 , y2 , 范围从 0 - 1,相当于在图形包围盒中的百分比,如果 global 为 true ,则  该四个值是绝对的像素位置      
<! DOCTYPE  html >  
< html  lang = " en" >  
< head>  
    < meta  charset = " UTF-8" >  
    < meta  name = " viewport"   content = " width=device-width, initial-scale=1.0" >  
    < meta  http-equiv = " X-UA-Compatible"   content = " ie=edge" >  
    < title>  线性渐变</ title>  
    < script  src = " https://cdn.jsdelivr.net/npm/echarts@5.4.1/dist/echarts.min.js" > </ script>  
</ head>  
< body>  
< div  id = ' app'   style = " width :  600px; height :  400px" > </ div>  
< script> 
    var  myCharts =  echarts. init ( document. getElementById ( 'app' ) ) 
    var  option =  { 
        xAxis :  { 
            type :  'category' ,    
            data :  [ '测试' ,  '研发' ,  '产品' ] 
        } , 
        yAxis :  { 
            type :  'value'  
        } , 
        title :  { 
            text :  '岗位' ,   
            link :  'https://blog.csdn.net/IT_heima' ,  
            target :  'blank' ,     
            textStyle :  {     
                color :  'pink' ,  
                fontWeight :  'bold'  
            } 
        } , 
        series :  [ 
            { 
                name :  '岗位' , 
                type :  'bar' ,   
                data :  [ 10 ,  90 ,  20 ] , 
                itemStyle :  { 
                    color :  { 
                        type :  'linear' , 
                        x :  0 ,    
                        y :  0 , 
                        x2 :  0 , 
                        y2 :  1 , 
                        colorStops :  [ { 
                            offset :  0 ,  color :  'pink'  
                        } ,  { 
                            offset :  1 ,  color :  'red'  
                        } ] 
                    } 
                } 
            } 
        ] 
    } 
    myCharts. setOption ( option) 
 </ script>  
</ body>  
</ html>  
  
效果     
径向渐变 
  线性渐变的类型为 radial , 他需要配置径向的方向, 通过 x , y , r 即可进行配置  前三个参数分别是圆心 x , y 和半径,取值同线性渐变      
<! DOCTYPE  html >  
< html  lang = " en" >  
< head>  
    < meta  charset = " UTF-8" >  
    < meta  name = " viewport"   content = " width=device-width, initial-scale=1.0" >  
    < meta  http-equiv = " X-UA-Compatible"   content = " ie=edge" >  
    < title>  线性渐变</ title>  
    < script  src = " https://cdn.jsdelivr.net/npm/echarts@5.4.1/dist/echarts.min.js" > </ script>  
</ head>  
< body>  
< div  id = ' app'   style = " width :  600px; height :  400px" > </ div>  
< script> 
    var  myCharts =  echarts. init ( document. getElementById ( 'app' ) ) 
    var  option =  { 
        xAxis :  { 
            type :  'category' ,    
            data :  [ '测试' ,  '研发' ,  '产品' ] 
        } , 
        yAxis :  { 
            type :  'value'  
        } , 
        title :  { 
            text :  '岗位' ,   
            link :  'https://blog.csdn.net/IT_heima' ,  
            target :  'blank' ,     
            textStyle :  {     
                color :  'pink' ,  
                fontWeight :  'bold'  
            } 
        } , 
        series :  [ 
            { 
                name :  '岗位' , 
                type :  'bar' ,   
                data :  [ 10 ,  90 ,  20 ] , 
                itemStyle :  {   
                    color :  { 
                        type :  'radial' ,  
                        x :  0.5 , 
                        y :  0.5 , 
                        r :  0.5 , 
                        colorStops :  [ 
                            { 
                                offset :  0 ,  color :  'red'  
                            } , 
                            { 
                                offset :  1 ,  color :  'pink'  
                            } 
                        ] 
                    } 
                } 
            } 
        ] 
    } 
    myCharts. setOption ( option) 
 </ script>  
</ body>  
</ html>  
  
效果