Varieties of the color blue may differ in hue, chroma (also called saturation, intensity, or colorfulness), or lightness (or value, tone, or brightness)...

recognized: B. m. musculus in the North Atlantic and North Pacific, B. m. intermedia in the Southern Ocean, B. m. brevicauda (the pygmy blue whale) in the...

Sky blue refers to a collection of shades comparable to that of a clear daytime sky. Typically it is a shade of cyan or light teal, though some iterations...

c ⋅ c = ( a − b ) ⋅ ( a − b ) = a ⋅ a − a ⋅ b − b ⋅ a + b ⋅ b = a 2 − a ⋅ b − a ⋅ b + b 2 = a 2 − 2 a ⋅ b + b 2 c 2 = a 2 + b 2 − 2 a b cos ⁡ θ {\displaystyle...

Royal blue is a deep and vivid shade of blue. It is said to have been created by a consortium of mills in Rode, Somerset, which won a competition to make...

(CuPc), also called phthalocyanine blue, phthalo blue and many other names, is a bright, crystalline, synthetic blue pigment from the group of dyes based...

Blue-green is the color between blue and green. It belongs to the cyan family. Cyan is the blue-green color that is between blue and green on a modern...

Navy blue is a dark shade of the color blue. Navy blue got its name from the dark blue (contrasted with naval white) worn by officers in the Royal Navy...

The Royal Blue was the Baltimore and Ohio Railroad (B&O)'s flagship passenger train between New York City and Washington, D.C., in the United States,...

reaction. Fast Blue BB is slightly slower than Fast Blue B, but the resulting colors are more vivid and intense. Due to concerns about Fast Blue B being carcinogenic...