A picture in cool colors only
The whole canvas — sky, stones, walls, clothes
Look for a warm color anywhere in the picture. Not a soft pink, not a yellow, not an orange, not a red. There isn’t one. Cool grays, slate blue, oyster white, dull black, the dark green of the cast-iron lamppost, the pale lavender-grey of the central umbrella, a single muted-green note on the wagon. The entire human range of warm color has been refused — on purpose. Caillebotte is telling you, by elimination, what kind of light a wet Paris morning has: the kind that drains color out of the city and leaves only its values.