freeCodeCamp/curriculum/challenges/chinese-traditional/14-responsive-web-design-22/learn-intermediate-css-by-b.../60b69a66b6ddb80858c51586.md

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---
id: 60b69a66b6ddb80858c51586
title: 步驟 16
challengeType: 0
dashedName: step-16
---
# --description--
使用 `id` 選擇器,爲 `offwhite-character` 元素創建規則。 給它一個 `width``300px`、一個 `height``550px` 和一個 `background-color``GhostWhite`
# --hints--
應該使用 `#offwhite-character` 選擇器。
```js
assert(new __helpers.CSSHelp(document).getStyle('#offwhite-character'));
```
`#offwhite-character` 應該有一個 `width` 屬性設置爲 `300px`
```js
assert(new __helpers.CSSHelp(document).getStyle('#offwhite-character')?.width === '300px');
```
`#offwhite-character` 應該有一個 `height` 屬性設置爲 `550px`
```js
assert(new __helpers.CSSHelp(document).getStyle('#offwhite-character')?.height === '550px');
```
`#offwhite-character` 應該有一個 `background-color` 屬性設置爲 `GhostWhite`
```js
assert(new __helpers.CSSHelp(document).getStyle('#offwhite-character')?.backgroundColor === 'ghostwhite');
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Picasso Painting</title>
<link rel="stylesheet" href="./styles.css" />
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css">
</head>
<body>
<div id="back-wall"></div>
<div class="characters">
<div id="offwhite-character">
<div id="white-hat"></div>
<div id="black-mask">
<div class="eyes left"></div>
<div class="eyes right"></div>
</div>
<div id="gray-instrument">
<div class="black-dot"></div>
<div class="black-dot"></div>
<div class="black-dot"></div>
<div class="black-dot"></div>
<div class="black-dot"></div>
</div>
<div id="tan-table"></div>
</div>
</div>
</body>
</html>
```
```css
body {
background-color: rgb(184, 132, 46);
}
#back-wall {
background-color: #8B4513;
width: 100%;
height: 60%;
position: absolute;
top: 0;
left: 0;
z-index: -1;
}
--fcc-editable-region--
--fcc-editable-region--
```