Cineraria Blue - Plum-Colored - Fleshly White - Blushing Pink - Eggshell Yellow - Pearl Grey - Golden - Orange Red - Ruby - Silver - Coral - Cabbage Green - Ultramarine - Roseate - Blood-Red - Opalescent - Plum Blue - Emerald-Green - Wine-Colored - Pearly - Scarlet - Dark Green - Crimson - Sky Blue - Orange - Lilac - Brown - Mauve - Red - Azure - Violet - Purple - Green - Grey - Yellow - Gold - Pink - Black - White - Blue
Blue is the most mentioned color in Swann's Way. There are blue eyes, blue feathers, cuffs and ceilings, blue tiles, and a portrait of a man with a blue mustache, among many other moods and tints.
I had to look up cineraria, which turns out to be a flower I’ve seen but never heard named before. The “ciner” suggested it could have to do with ash, and indeed the German name is ‘Aschenblume,’ or ash flower, but in reference to the underside of the leaves rather than the petals.
I love how Proust's characters look at the sunset and imagine flowers blooming.
The image from a seed packet found at the Smithsonian. You can see it says "cineraria hybrida." There are other varieties I found online that are even more intensely blue, and lack the white ring around the center.