Color Theory and Symbolism

Rubies are the red variety of the mineral corundum. The red color comes from trace amounts of chromium in the crystal structure. All other colors of corundum are called sapphires.

The official match ball for the 1998 FIFA World Cup in France was called 'Tricolore' (meaning three-colored, referencing the French flag). The other options are misspellings or balls from different tournaments - 'Jabulani' was from 2010, for example.

The official match ball for the 2010 FIFA World Cup in South Africa was 'Jabulani'. The other options are from different tournaments: Fevernova (2002), Tricolore (1998), Tango (various years including 1978 and 1982).

A rainbow displays seven colors in the following order: Red, Orange, Yellow, Green, Blue, Indigo, and Violet (ROYGBIV). Pink is not part of the natural rainbow spectrum as it is a composite color not produced by the prism-like dispersion of white sunlight.

On the London Underground map, the Circle Line is colored yellow. This color coding helps passengers navigate the subway system easily. The District line is green, the Northern line is black, and the Piccadilly line is blue, not the Circle line.

Sappires are gem-quality varieties of the mineral corundum, and while they come in many colors (including pink, yellow, and green), the classic sapphire color is deep blue. The red variety is called ruby.

India's one-day international cricket kit has been predominantly blue since the introduction of colored clothing to ODI cricket in the 1980s. This choice reflects the blue color in the Indian flag and has become India's signature color in limited-overs cricket. Various shades of blue have been used, but blue has remained consistent across different sponsors and eras.

Jet Airways cabin crew (air hostesses) traditionally wore yellow sarees as their uniform color. This was a distinctive feature of the airline's branding.

When white light passes through a prism, it disperses into a continuous band of seven colors called a spectrum. This happens because different colors (wavelengths) bend at different angles as they enter and exit the prism. The scientific term for this rainbow-like pattern is 'spectrum', not 'color band' or 'color arc'.

In the standard RYB color wheel used in art, secondary colors are created by mixing two primary colors. Green is made by mixing blue and yellow (both primary). Blue is itself a primary color, while pink, white, and brown are tertiary or neutral colors.

Original Coca-Cola was actually green in color when first created. The dark brown color we associate with Coke today came later. This is a piece of historical trivia about the famous beverage.