Certainly one would expect that men of learning, at least, would employ the broader color terms correctly; but some of the highest authorities on color-physics habitually use them interchangeably, as if they were quite synonymous; and even the dictionaries, with few exceptions, give incorrect or "hazy" definitions of these terms. It is not strictly correct to say a "dark tint" or "light shade" of any color, because a _tint_ implies a color _paler_ than the full color, while a shade means exactly the opposite; and to say an "orange shade (or tint) of red," a "greenish shade (or tint) of blue," a "bluish shade (or tint) of violet," etc., is an absurdity, for the term _hue_, which specifically and alone refers to relative position in the spectrum scale, without reference to lightness or darkness, is the only one which can correctly be used in such cases. Indeed the standardization of color terms is almost if not quite as important, in the interest of educational progress, as that of the colors themselves and their names; therefore, to make easy a clear understanding of the specific meaning of each, the following definitions are given:— _Color._—The term of widest application, being the only one which can be used to cover the entire range of chromatic manifestation; that is to say, the spectrum colors (together with those between violet and red, not shown in the spectrum) with all their innumerable variations of luminosity, mixture, etc. In a more restricted sense, applied to the six distinct spectrum colors (red, orange, yellow, green, blue, and violet), which are sometimes distinguished as _fundamental colors_ or _spectrum colors_. _Hue._—While often used interchangeably or synonymously with color, the term _hue_ is more properly restricted by special application to those lying between any contiguous pair of spectrum colors (also between violet and purple and between purple and red); as an orange _hue_ (not shade or tint, as so often incorrectly said) of red; a yellow _hue_ of orange; a greenish _hue_ of yellow; a bluish _hue_ of green; a violet _hue_ of blue, etc. _Tint._—Any color (pure or broken) weakened by high illumination or (in the case of pigments) by admixture of white, or (in the case of dyes or washes) by excess of aqueous or other liquid medium; as, a deep, medium, light, pale or delicate (pallid) _tint_ of red. The term cannot correctly be used in any other sense. _Shade._—Any color (pure or broken) darkened by shadow or (in the case of pigments) by admixture of black; exactly the opposite of _tint_; as a medium, dark, or very dark (dusky) _shade_ of red.