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Convert an XYZ Color to CIELAB Color Space with PHP

In 1931, CIE (Commission Internationale de l'Eclairage) defined the CIE XYZ color space, representing all possible colors based on human perception. Like RGB, CIE...

Convert Between RGB and CMYK Color Values with PHP

The CMYK color model is a subtractive color model used in color press printing. CMYK refers to the four inks used in some color...

Convert a HEX Color Value or RGB Array to CIE XYZ

The CIE XYZ color model (created in 1931) is a 'device-independent' colour space in which each primary colour (X,Y,Z) is always constant, unlike RGB...

Convert RGB Colour Values to HSV and HSL with PHP

The RGB model of visualising color can be problematic on the web because of the nature in which the values are mixed. Not unlike...

Convert Colours Between their Hexadecimal and RGB Values with PHP

The PHP functions on this page will permit you to convert hexadecimal values to their RGB value, or vice versa. Both the Hexadecimal and...


FAA Aircraft Registration API

Of all the services we make available, the FAA aircraft registration API might be the oldest. It was set up as as part of...

History API

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