Red is also one of the subtractive primary colors of RYB color space but not CMYK color space. Red is used as one of the additive primary colors of light, complementary to cyan, in RGB color systems. Longer wavelengths than this are called infrared (below red), and cannot be seen by the naked human eye. Red is any of a number of similar colors evoked by light consisting predominantly of the longest wavelengths of light discernible by the human eye, in the wavelength range of roughly 625≧40 nm. This semi-precious gemstone is noted for its rich shade of reddish-brown.
It may also refer to the color of the blood of a living person.Ĭarnelian is a color named after the carnelian variety of the mineral chalcedony. Traditionally, scarlet is the color of flame. Scarlet (from the Persian säqirlāt) is a bright red color with a hue that is somewhat toward the orange. The traditional color remains popular today due to its effectiveness in preserving wood. The paint originated from the copper mine at Falun in Dalarna, Sweden. (According to wikipedia: en./wiki/Category…) Also note that these are not going to be exact, but only the general idea.)įalu red or Falun red (in Swedish Falu rödfärg) is the name of a Swedish, deep red paint well known for its use on wooden cottages and barns.