(PHP 4 >= 4.0.1, PHP 5)
imagecolorclosesthwb — Get the index of the color which has the hue, white and blackness nearest to the given color
此函式目前沒有參考文件;只有引數列表。
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
Value of red component
Value of green component
Value of blue component