All colors have a wavelength on the visual spectrum. Cool colors have slower wavelengths than warm colors. Objects that are red is a visual cue that it might be hot to the touch. Objects that are blue is a visual cue that it might be cool to the touch. While looking at a painting, warm colors reach our eyes faster than cool colors. It all has to do with the speed of the wavelength.

Cezanne's Still Life with Apples (1893-1894) is an awesome example of using color temperature to control the viewer's eye.

SOURCES:

Paul Cézanne (French, 1839 - 1906)
Still Life with Apples, 1893 - 1894, Oil on canvas
65.4 × 81.6 cm (25 3/4 × 32 1/8 in.)
The J. Paul Getty Museum, Los Angeles

Visual spectrum wavelengths: https://www.sciencelearn.org.nz/resources/47-colours-of-light

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