Radiative cooling, which aims at cooling objects by radiating heat into the outer space through the atmosphere window, has garnered wide interests since it is a passive refrigeration mode without extra energy consumption. However, most of the proposed structures, to maximize the cooling performance, are in white color, which may limit their practical applications due to some aesthetic consideration. To reveal the competing role between color display and radiative cooling performance, we take a metal-dielectric-metal (MDM) colored radiative cooler structure as representative to explore how the structure parameters influence the cooling performance and color display respectively, and clarify the key parameters for the desired performance. Moreover, the reflectance of the colored radiative cooler is identified as peak- and valley-types to clarify the color display performance. The Spearman rank order correlation coefficients between radiative cooling performance and the CIE-LCH color space parameters (lightness, chroma, and hue) are calculated, revealing that the lightness plays a dominant role. The present study is expected to reveal the competing role of radiative cooling power and color display, and trigger the practical applications of radiative cooling technologies.

辐射冷却是一种无额外能源消耗的被动制冷方式，其目的是通过大气窗口将热量辐射到外层空间来冷却物体，因此受到了广泛的关注。然而，为了最大限度地提高冷却性能，大多数提出的结构都是白色的，由于一些美学考虑，这可能会限制它们的实际应用。为了揭示彩色显示和辐射散热性能之间的竞争作用，我们以金属-电介质-金属（MDM）彩色辐射冷却器结构为代表，分别探讨了结构参数如何影响散热性能和彩色显示，并明确了关键参数以获得所需的性能。而且，彩色辐射冷却器的反射率被确定为峰型和谷型，以阐明彩色显示性能。计算辐射冷却性能与 CIE-LCH 颜色空间参数（亮度、色度和色调）之间的 Spearman 等级相关系数，表明亮度起主导作用。本研究有望揭示辐射冷却功率和彩色显示器的竞争作用，并引发辐射冷却技术的实际应用。