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# imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha -- Get the index of the closest color to the specified color + alpha

## Beschreibung

int imagecolorclosestalpha ( resource image, int red, int green, int blue, int alpha )

Returns the index of the color in the palette of the image which is "closest" to the specified RGB value and `alpha` level.

## Parameter Liste

`image`

  An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

`red`

  Value of red component

`green`

  Value of green component

`blue`

  Value of blue component

`alpha`

  A value between `0` and `127`. `0` indicates completely opaque while `127` indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

## Rückgabewerte

Returns the index of the closest color in the palette.

## Anmerkungen

> Anmerkung: Diese Funktion setzt die GD Bibliothek in der Version 2.0.1 oder höher voraus.

## Siehe auch

imagecolorexactalpha()

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