  Daytime radiative cooling is a promising passive cooling technology for
combating global warming. Existing daytime radiative coolers usually show
whitish colors due to their broadband high solar reflectivity, which severely
impedes applications in real-life situations with aesthetic demands and
effective display. However, there is a trade-off between vivid colors and high
cooling performance because colors are often produced by absorption of visible
light, decreasing net cooling power. To break this trade-off, we design
multilayered structures with coupled nanocavities and produce structural colors
with high cooling performance. Using this design, we can obtain colorful
radiative coolers which show a larger color gamut (occupying 17.7% sRGB area)
than reported ones. We further fabricate colorful multilayered radiative
coolers (CMRCs) and demonstrate they have temperature drops of 3.4 - 4.4
degrees on average based on outdoor experiments. These CMRCs are promising in
thermal management of electronic/optoelectronic devices and outdoor facilities.
