從雙色調資訊圖表探討：彩度對比對觀者閱讀體驗之影響

Exploring from Dual-Tone Information Graphics: The Impact of Saturation Contrast on Viewer's Reading Experience

在資訊爆炸的當代社會，資訊圖表已成為有效整合與傳遞訊息的重要視覺工具。隨著扁平化繪圖與減法設計理念的廣泛應用，如何降低圖表內容的認知負荷與視覺複雜度，日益成為設計實務中不可忽視的課題。色彩作為視覺資訊中最早被人腦接收與處理的元素，其在圖表中的運用對於資訊傳達具有關鍵性影響。本文聚焦於對比配色中的「彩度對比」，探討不同彩度對比在資訊圖表閱讀體驗之影響。
本研究以「低彩度對比」、「原始配色」與「高彩度對比」三種條件為實驗變項，透過專家進行實驗樣本的篩選與分類，並以卡方檢定與費雪精確檢定等統計方法進行資料分析，旨在歸納彩度對比於資訊圖表閱讀歷程中所產生之影響樣態。研究結果可歸納為以下三點，俾供相關設計實務與後續研究參考：
1.資訊理解與彩度對比之關聯性：在控制色相與明度對比維持於特定範圍時，多數情況下，即使未明顯調整彩度對比，亦可達到良好之資訊理解表現。然而，當圖表色彩配置以冷色與中性色為主時，適度提高彩度對比有助於進一步增進資訊辨識效果。
2.適閱性與理解程度的差異性：資訊圖表作為統整型視覺媒介，其理解程度與閱讀舒適度不必然一致。當色相與明度具備基本對比時，適當的彩度對比可提升視覺舒適性。惟因風格與配色策略差異，彩度降低亦可能達致近似效果。
3.注目性之視覺設計考量：圖形結構相同複雜度情況下，彩度對比增強，在各色調搭配組合中的注目度方面，皆有顯著差異，反映彩度操作為提升視覺吸引力之關鍵變項。

In today's information-saturated society, infographics serve as vital tools for visually organizing and conveying data. With the rise of flat and reductive design approaches, reducing cognitive load and visual complexity has become a key design challenge. Color—processed early by the human visual system—plays a crucial role in this context. This study investigates the effect of chroma contrast in color pairing on infographic readability.
Three chroma contrast levels—low, original, and high—were tested. Samples were screened by experts, and data were analyzed using Chi-square and Fisher’s exact tests. Key findings include:
1.Comprehension: Effective understanding is often achievable without high chroma contrast, but cooler or neutral palettes benefit from moderate chroma increases for better legibility.
2.Readability vs. Comprehension: Visual comfort does not always align with comprehension. Moderate chroma contrast improves readability when basic hue and lightness contrasts are present, though low chroma can sometimes yield similar results.
3.Visual Salience: Higher chroma contrast consistently enhances attention across various color combinations, highlighting its role in increasing visual impact.