---
id: css-background-image
title: "CSS Background Image"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["background-image", "background image url", "CSS background image", "image background", "url() background"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-06-23
updated_at: 2026-06-23
review_reason: ""
merge_history: []
tags: ["css", "web", "frontend", "w3schools", "background", "image"]
raw_sources: ["https://www.w3schools.com/css/css_background_image.asp"]
applied_in: []
github_commit: ""
---

# [[CSS Background Image]]

## 🎯 한 줄 통찰 (One-line insight)
The `background-image` property sets an image as the background of an element, and by default the image is repeated so it covers the entire element. [S1]

## 🧠 핵심 개념 (Core concepts)
- **background-image** — specifies an image to use as the background of an element. [S1]
- **Default tiling** — by default, the image is repeated so it covers the entire element. [S1]
- **Image source** — the image is referenced with the `url()` function (e.g. `url("paper.gif")`). [S1]
- **Applies to any element** — a background image can be set on the whole page (`body`) or on a specific element such as a paragraph. [S1]
- **Readability matters** — when using a background image, use an image that does not disturb the text. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **Page-wide vs element-scoped** — set `background-image` on `body` for the entire page, or on a specific selector (e.g. `p`) to scope it to that element. [S1]
- **Contrast check** — choose an image that keeps the overlaid text readable; busy images make text "hardly readable." [S1]

## 📖 세부 내용 (Details)
**Background Image**
The `background-image` property specifies an image to use as the background of an element. By default, the image is repeated so it covers the entire element. [S1]

The background image for a page can be set like this: [S1]
```css
body {
  background-image: url("paper.gif");
}
```

> Note: When using a background image, use an image that does not disturb the text. The page shows a counter-example where a busy image makes "the text is hardly readable": [S1]
```css
body {
  background-image: url("bgdesert.jpg");
}
```

The background image can also be set for specific elements, like the `<p>` element: [S1]
```css
p {
  background-image: url("paper.gif");
}
```

The page's property reference table lists `background-image`, described as the property that sets the background image for an element. [S1]

## 🛠️ 적용 사례 (Applied in summary)
The CSS rules above are the page's own demonstration examples for `body` and `p`. No external project/commit applications found in the source.

## 💻 코드 패턴 (Code patterns)
Page background image (language: CSS):
```css
body {
  background-image: url("paper.gif");
}
```
Element-scoped background image:
```css
p {
  background-image: url("paper.gif");
}
```

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
No contradictions found in the source.

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.88
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[CSS Tutorial]]
- **관련 개념:** [[CSS Background Repeat]], [[CSS Background Attachment]], [[CSS Background Shorthand]], [[CSS Background Color]]
- **참조 맥락:** Referenced whenever an image is placed behind page or element content; pairs with background-repeat and background-position to control its tiling and placement.

## 📚 출처 (Sources)
- [S1] W3Schools — CSS Background Image — https://www.w3schools.com/css/css_background_image.asp

## 📝 변경 이력 (Change history)
- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Background Image" page (Astra wiki-curation, P-Reinforce v3.1 format).
