Altura Cantilever Umbrella – Indigo Canopy – Frontgate

Altura may refer to:

• Altura (Trieste), a neighbourhood in Trieste, Italy
• Altura (Castro Marim), a town and civil parish in the Algarve, Portugal
• Altura (Castellón), a municipality in Spain
• Altura, Minnesota, a city in the US
• Altura, New Jersey, an unincorporated community in the US
• Altura Credit Union, a credit union in California, US
• Altura, a fictional kingdom in Italo Montemezzi's L'amore dei tre re
• Altura (film), a 1949 Italian drama film

A cantilever is a rigid structural element that extends horizontally and is unsupported at one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a cantilever can be formed as a beam, plate, truss, or slab.

When subjected to a structural load at its far, unsupported end, the cantilever carries the load to the support where it applies a shear stress and a bending moment.

Cantilever construction allows overhanging structures without additional support.

Indigo is a term used for a number of hues in the region of blue. The word comes from the ancient dye of the same name. The term "indigo" can refer to the color of the dye, various colors of fabric dyed with indigo dye, a spectral color, one of the seven colors of the rainbow as described by Newton, or a region on the color wheel, and can include various shades of blue, ultramarine, and green-blue. Since the web era, the term has also been used for various purple and violet hues identified as "indigo", based on use of the term "indigo" in HTML web page specifications.

The word "indigo" comes from the Latin word indicum, meaning "Indian", as the naturally based dye was originally exported to Europe from India.

The Early Modern English word indigo referred to the dye, not to the color (hue) itself, and indigo is not traditionally part of the basic color-naming system.

The first known recorded use of indigo as a color name in English was in 1289.

Isaac Newton regarded indigo as a color in the visible spectrum, as well as one of the seven colors of the rainbow: the color between blue and violet; however, sources differ as to its actual position in the electromagnetic spectrum. Later scientists have concluded that what Newton called "blue" was what is now called cyan or blue-green; and what Newton called "indigo" was what is now called blue.

In the 1980s, programmers produced a somewhat arbitrary list of color names for the X Window computer operating system, resulting in the HTML and CSS specifications issued in the 1990s using the term "indigo" for a dark purple hue. This has resulted in violet and purple hues also being associated with the term "indigo" since that time.

Because of the Abney effect, pinpointing indigo to a specific hue value in the HSV color wheel is elusive, as a higher HSV saturation value shifts the hue towards blue. However, on the new CIECAM16 standard, the hues values around 290° may be thought of as indigo, depending on the observer.

An umbrella or parasol is a folding canopy supported by wooden or metal ribs that is mounted on a wooden, metal, or plastic pole. It is usually designed to protect a person against rain. The term umbrella is traditionally used when protecting oneself from rain, while parasol is used when protecting oneself from sunlight, though the terms continue to be used interchangeably. Often the difference is the material used for the canopy; some parasols are not waterproof, and some umbrellas are transparent. Umbrella canopies may be made of fabric or flexible plastic. There are also combinations of parasol and umbrella that are called en-tout-cas (French for "in any case").

Generally speaking, parasols and umbrellas are small, handheld, personal use items. Golf umbrellas are the biggest hand-portable umbrellas available. There are two types of umbrellas: completely collapsible umbrellas, which can be folded up into a small enough bag because of the supporting metal pole's ability to retract, and non-collapsible umbrellas, which only have the canopy that can be folded up. Manually operated umbrellas and spring-loaded automatic umbrellas, which open with a button press, can also be distinguished from one another.

Hand-held umbrellas have a type of handle which can be made from wood, a plastic cylinder or a bent "crook" handle (like the handle of a cane). Umbrellas are available in a range of price and quality points, ranging from inexpensive, modest quality models sold at discount stores to expensive, finely made, designer-labeled models. Larger parasols capable of blocking the sun for several people are often used as fixed or semi-fixed devices, used with patio tables or other outdoor furniture, or as points of shade on a sunny beach.