scarlet-crimson

For instance, the California Poppies, if left to themselves, will take yellow of many resplendent shades for their color, and never vary their cool, gray-green, red-tipped foliage; the Peacock Poppy will be always scarlet-crimson, with a black spot rimmed with white in every petal; the Corn Poppy will be always clear scarlet; the Bride a miracle of lustrous white, and so on.

An Island Garden 1894