Slate gray

Light slate gray
Light slate gray
Color coordinates
Hex triplet	#778899
sRGBB (r, g, b)	(119, 136, 153)
HSV (h, s, v)	(210°, 22%, 60%)
CIELChuv (L, C, h)	(56, 19, 239°)
Source	X11
ISCC–NBS descriptor	Grayish blue
	B: Normalized to [0–255] (byte);

Slate gray
Slate gray
Color coordinates
Hex triplet	#708090
sRGBB (r, g, b)	(112, 128, 144)
HSV (h, s, v)	(210°, 22%, 56%)
CIELChuv (L, C, h)	(53, 17, 239°)
Source	X11
ISCC–NBS descriptor	Grayish blue
	B: Normalized to [0–255] (byte);

Slate gray is a gray color with a slight azure tinge that is a representation of the average color of the material slate. As a tertiary color, slate is an equal mix of purple and green pigments.

Slaty, referring to this color, is often used to describe birds.

The first recorded use of slate gray as a color name in English was in 1705.

Variations

Light slate gray

Displayed at right is the web color light slate gray.

Dark slate gray

Dark slate gray

Color coordinates
Hex triplet	#2F4F4F
sRGB^B (r, g, b)	(47, 79, 79)
HSV (h, s, v)	(180°, 41%, 31%)
CIELCh_uv (L, C, h)	(31, 14, 192°)
Source	X11
ISCC–NBS descriptor	Dark bluish green
B: Normalized to [0–255] (byte)

Displayed at right is the web color dark slate gray.

In human culture

Computers

Mid-1980s supercomputer Thinking Machines CM-1 (the Connection Machine) at the Computer History Museum in Mountain View, California. One of the face plates has been partially removed to show the circuit boards inside.

IBM Roadrunner supercomputer—the fastest supercomputer in the world in May 2008, it could operate at a speed of 1.026 petaflops

The exterior shells of supercomputers are often colored various shades of slate gray.
The iPhone 5 and the iPad Mini comes in a dark slate gray colored aluminum body contrasted with black.
Western Electric used the term SLATE for the color instead of gray in their 25-pair (and multiples) cable for pairs 5-10-15-20-25.

Transportation

The New York City Subway shuttle bullet, used on three New York City Subway shuttle services.

The S New York City Subway service bullet, used in three out of the system's 28 services, is colored slate gray.

Military

The Fleet Air Arm aircraft Temperate Day Scheme in the World War Two was dark slate gray over extra dark sea gray on top sides and Sky on undersides. This scheme was referred as "slime over sludge".

References