Which basic colour has a shade known as carmine?

Carmine is the general term for some deep red colours that are very slightly purplish but are generally slightly closer to red than the colour crimson.

The first recorded use of carmine as a color name in English was in 1523. Carmine or E120, was originally a pigment of a bright-red color obtained from the aluminium salt of carminic acid, which is produced by some scale insects, such as the cochineal scale and the Polish cochineal, and is used as a general term for a particularly deep-red color of the same name.

Carmine is used in the manufacture of artificial flowers, paints, crimson ink, rouge, and other cosmetics, and is routinely added to food products such as yogurt and certain brands of juice, the most notable ones being those of the ruby-red variety.

To prepare true carmine, the powdered scale insect bodies are boiled in ammonia or a sodium carbonate solution, the insoluble matter is removed by filtering, and alum is added to the clear salt solution of carminic acid to precipitate the red aluminium salt, called "carmine lake" or "crimson lake." Purity of color is ensured by the absence of iron.

The rich scarlet color tone was depicted the as carmine in the 1930 book 'A Dictionary of Color'. This color is also called Chinese carmine. This is the color usually referred to as carmine in fashion and interior design.