<gradient>

試一試

background: linear-gradient(#f69d3c, #3f87a6);

background: radial-gradient(#f69d3c, #3f87a6);

background: repeating-linear-gradient(#f69d3c, #3f87a6 50px);

background: repeating-radial-gradient(#f69d3c, #3f87a6 50px);

background: conic-gradient(#f69d3c, #3f87a6);

<section class="display-block" id="default-example">
  <div id="example-element"></div>
</section>

#example-element {
  min-height: 100%;
}

CSS 漸變沒有固有尺寸；也就是說，它沒有自然或首選尺寸，也沒有首選比例。它的具體尺寸將與它所應用的元素的尺寸相匹配。

語法

<gradient> 資料型別由下面列出的函式型別之一定義。

線性漸變

線性漸變沿一條假想線逐步過渡顏色。它們透過 linear-gradient() 函式生成。

徑向漸變

徑向漸變從中心點（原點）逐步過渡顏色。它們透過 radial-gradient() 函式生成。

錐形漸變

錐形漸變圍繞圓形逐步過渡顏色。它們透過 conic-gradient() 函式生成。

重複漸變

重複漸變根據需要複製漸變以填充給定區域。它們透過 repeating-linear-gradient()、repeating-radial-gradient() 和 repeating-conic-gradient() 函式生成。

插值

與任何涉及顏色的插值一樣，漸變是在預乘 alpha 顏色空間中計算的。這可以防止當顏色和不透明度都發生變化時出現意想不到的灰色陰影。（請注意，舊版瀏覽器在使用透明關鍵字時可能不使用此行為。）

正式語法

<gradient> = 
  <linear-gradient()>            |
  <repeating-linear-gradient()>  |
  <radial-gradient()>            |
  <repeating-radial-gradient()>  |
  <conic-gradient()>             |
  <repeating-conic-gradient()>   

<linear-gradient()> = 
  linear-gradient( [ <linear-gradient-syntax> ] )  

<repeating-linear-gradient()> = 
  repeating-linear-gradient( [ <linear-gradient-syntax> ] )  

<radial-gradient()> = 
  radial-gradient( [ <radial-gradient-syntax> ] )  

<repeating-radial-gradient()> = 
  repeating-radial-gradient( [ <radial-gradient-syntax> ] )  

<conic-gradient()> = 
  conic-gradient( [ <conic-gradient-syntax> ] )  

<repeating-conic-gradient()> = 
  repeating-conic-gradient( [ <conic-gradient-syntax> ] )  

<linear-gradient-syntax> = 
  [ [ <angle> | <zero> | to <side-or-corner> ] || <color-interpolation-method> ]? , <color-stop-list>  

<radial-gradient-syntax> = 
  [ [ [ <radial-shape> || <radial-size> ]? [ at <position> ]? ] || <color-interpolation-method> ]? , <color-stop-list>  

<conic-gradient-syntax> = 
  [ [ [ from [ <angle> | <zero> ] ]? [ at <position> ]? ] || <color-interpolation-method> ]? , <angular-color-stop-list>  

<side-or-corner> = 
  [ left | right ]  ||
  [ top | bottom ]  

<color-interpolation-method> = 
  in [ <rectangular-color-space> | <polar-color-space> <hue-interpolation-method>? | <custom-color-space> ]  

<color-stop-list> = 
  <linear-color-stop> , [ <linear-color-hint>? , <linear-color-stop> ]#?  

<radial-shape> = 
  circle   |
  ellipse  

<radial-size> = 
  <radial-extent>               |
  <length [0,∞]>                |
  <length-percentage [0,∞]>{2}  

<position> = 
  <position-one>   |
  <position-two>   |
  <position-four>  

<angular-color-stop-list> = 
  <angular-color-stop> , [ <angular-color-hint>? , <angular-color-stop> ]#?  

<rectangular-color-space> = 
  srgb               |
  srgb-linear        |
  display-p3         |
  display-p3-linear  |
  a98-rgb            |
  prophoto-rgb       |
  rec2020            |
  lab                |
  oklab              |
  <xyz-space>        

<polar-color-space> = 
  hsl    |
  hwb    |
  lch    |
  oklch  

<hue-interpolation-method> = 
  [ shorter | longer | increasing | decreasing ] hue  

<custom-color-space> = 
  <dashed-ident>  

<linear-color-stop> = 
  <color> <color-stop-length>?  

<linear-color-hint> = 
  <length-percentage>  

<radial-extent> = 
  closest-corner   |
  closest-side     |
  farthest-corner  |
  farthest-side    

<length-percentage> = 
  <length>      |
  <percentage>  

<position-one> = 
  left                 |
  center               |
  right                |
  top                  |
  bottom               |
  x-start              |
  x-end                |
  y-start              |
  y-end                |
  block-start          |
  block-end            |
  inline-start         |
  inline-end           |
  <length-percentage>  

<position-two> = 
  [ left | center | right | x-start | x-end ] && [ top | center | bottom | y-start | y-end ]  |
  [ left | center | right | x-start | x-end | <length-percentage> ] [ top | center | bottom | y-start | y-end | <length-percentage> ]  |
  [ block-start | center | block-end ] && [ inline-start | center | inline-end ]  |
  [ start | center | end ]{2}                         

<position-four> = 
  [ [ left | right | x-start | x-end ] <length-percentage> ] && [ [ top | bottom | y-start | y-end ] <length-percentage> ]  |
  [ [ block-start | block-end ] <length-percentage> ] && [ [ inline-start | inline-end ] <length-percentage> ]  |
  [ [ start | end ] <length-percentage> ]{2}          

<angular-color-stop> = 
  <color> <color-stop-angle>?  

<angular-color-hint> = 
  <angle-percentage>  |
  <zero>              

<xyz-space> = 
  xyz      |
  xyz-d50  |
  xyz-d65  

<color-stop-length> = 
  <length-percentage>{1,2}  

<color-stop-angle> = 
  [ <angle-percentage> | <zero> ]{1,2}  

<angle-percentage> = 
  <angle>       |
  <percentage>  

示例

線性漸變示例

一個線性漸變。

<div class="linear-gradient">Linear gradient</div>

div {
  width: 240px;
  height: 80px;
}

.linear-gradient {
  background: linear-gradient(
    to right,
    red,
    orange,
    yellow,
    green,
    blue,
    indigo,
    violet
  );
}

徑向漸變示例

一個徑向漸變。

<div class="radial-gradient">Radial gradient</div>

div {
  width: 240px;
  height: 80px;
}

.radial-gradient {
  background: radial-gradient(red, yellow, dodgerblue);
}

錐形漸變示例

一個錐形漸變示例。

<div class="conic-gradient">Conic gradient</div>

div {
  width: 200px;
  height: 200px;
}

.conic-gradient {
  background: conic-gradient(pink, coral, lime);
}

重複漸變示例

重複的線性漸變和徑向漸變示例。

<div class="linear-repeat"></div>
<span>Repeating linear gradient</span>
<hr />
<div class="radial-repeat"></div>
<span>Repeating radial gradient</span>
<hr />
<div class="conic-repeat"></div>
<span>Repeating conic gradient</span>

div {
  display: inline-block;
  width: 240px;
  height: 80px;
}

span {
  font-weight: bold;
  vertical-align: top;
}

.linear-repeat {
  background: repeating-linear-gradient(
    to top left,
    pink,
    pink 5px,
    white 5px,
    white 10px
  );
}

.radial-repeat {
  background: repeating-radial-gradient(
    lime,
    lime 15px,
    white 15px,
    white 30px
  );
}

.conic-repeat {
  background: repeating-conic-gradient(lime, pink 30deg);
}

規範

瀏覽器相容性

另見

• 使用 CSS 漸變
• 漸變函式：linear-gradient()、repeating-linear-gradient()、radial-gradient()、repeating-radial-gradient()、conic-gradient()、repeating-conic-gradient()
• CSS 基本資料型別
• CSS 值和單位模組
• 學習：值和單位