refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: css-hex-colors
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title: "CSS HEX Colors"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["HEX", "hexadecimal color", "#rrggbb", "3-digit HEX", "CSS hex code", "color hex"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["css", "web", "frontend", "w3schools", "color", "hex"]
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raw_sources: ["https://www.w3schools.com/css/css_colors_hex.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS HEX Colors]]
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## 🎯 한 줄 통찰 (One-line insight)
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A HEX color is specified with `#RRGGBB`, where each two-digit hexadecimal pair (00–ff, equal to decimal 0–255) sets the red, green, and blue intensity. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **HEX format** — a hexadecimal color is specified with `#RRGGBB`, where the RR (red), GG (green), and BB (blue) hexadecimal integers specify the components of the color. [S1]
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- **Range** — each component value is between 00 and ff (the same as decimal 0 to 255). [S1]
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- **Red example** — `#ff0000` is displayed as red, because red is set to its highest value (ff) and the others are set to the lowest value (00). [S1]
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- **Black and white** — black is `#000000`; white is `#ffffff`. [S1]
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- **3-digit shorthand** — the `#rgb` short form works only when both hexadecimal digits within each component pair are the same. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Equal pairs = gray** — when all three pairs hold the same value, the result is a shade of gray. [S1]
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- **Shorthand condition** — `#rgb` is a valid abbreviation of `#rrggbb` only when each pair is a doubled digit (e.g. `ff`, `cc`, `99`). [S1]
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## 📖 세부 내용 (Details)
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**HEX Value**
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A hexadecimal color is specified with `#RRGGBB`, where the RR (red), GG (green), and BB (blue) hexadecimal integers specify the components of the color. All values are between 00 and ff. `#ff0000` is displayed as red, because red is set to its highest value (ff) and the others are set to the lowest value (00). Black is `#000000` and white is `#ffffff`. [S1]
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Examples of HEX color values shown on the page: [S1]
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```css
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#ff0000 /* red */
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#0000ff /* blue */
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#3cb371 /* medium sea green */
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#ee82ee /* violet */
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#ffa500 /* orange */
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#6a5acd /* slate blue */
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```
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**Shades of Gray**
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Shades of gray are often defined using equal values for all three light sources: [S1]
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```css
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#3c3c3c
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#616161
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#787878
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#b4b4b4
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#f0f0f0
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#f9f9f9
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```
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**3 Digit HEX Value**
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The 3-digit hex code is a shorthand for some 6-digit hex codes. It is written as `#rgb`, where r, g, and b are repeated to create the full 6-digit form (`#rrggbb`). The 3-digit hex code can only be used when both the values (RR, GG, and BB) are the same for each component. [S1]
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Examples of valid 3-digit shorthands: [S1]
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```css
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#fc9 /* same as #ffcc99 */
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#f0f /* same as #ff00ff */
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#b58 /* same as #bb5588 */
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```
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## 🛠️ 적용 사례 (Applied in summary)
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The color values above are the page's own demonstration examples. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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6-digit HEX (language: CSS):
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```css
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selector {
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color: #rrggbb; /* each pair 00–ff */
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}
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```
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3-digit HEX shorthand (only when each pair is a doubled digit):
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```css
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selector {
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color: #rgb; /* e.g. #f0c == #ff00cc */
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}
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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- **6-digit vs 3-digit HEX** — use the full `#rrggbb` form for any color; the `#rgb` shorthand is only usable when each component pair is a doubled digit, in which case it produces an identical color with fewer characters. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS RGB]], [[CSS HSL]], [[CSS Colors]], [[CSS Background Color]]
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- **참조 맥락:** Referenced whenever a color is specified as a hexadecimal code, the most common form in stylesheets.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS HEX Colors — https://www.w3schools.com/css/css_colors_hex.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS HEX Colors" page (Astra wiki-curation, P-Reinforce v3.1 format).
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