我正在寻找一个功能,可以准确地表示两种颜色之间的距离作为数字或东西.
例如,我正在寻找一个数组的十六进制值或RGB数组,我想找到一个给定的颜色在数组中最相似的颜色
例如.我传递一个RGB值的函数,并返回数组中最接近的颜色
每个颜色表示为十六进制代码中的元组.要确定近距离匹配,您需要分别减去每个RGB组件.
例：
Color 1: #112233 Color 2: #122334 Color 3: #000000 Difference between color1 and color2: R=1,G=1 B=1 = 0x3 Difference between color3 and color1: R=11,G=22,B=33 = 0x66 So color 1 and color 2 are closer than 1 and 3.
编辑
那么你想要最接近的命名颜色？使用每种颜色的十六进制值创建一个数组,然后循环并返回名称.这样的东西
function getColor($rgb)
{
// these are not the actual rgb values
$colors = array(BLUE =>0xFFEEBB,RED => 0x103ABD,GREEN => 0x123456);
$largestDiff = 0;
$closestColor = "";
foreach ($colors as $name => $rgbColor)
{
if (colorDiff($rgbColor,$rgb) > $largestDiff)
{
$largestDiff = colorDiff($rgbColor,$rgb);
$closestColor = $name;
}
}
return $closestColor;
}
function colorDiff($rgb1,$rgb2)
{
// do the math on each tuple
// Could use bitwise operates more efficiently but just do strings for Now.
$red1 = hexdec(substr($rgb1,2));
$green1 = hexdec(substr($rgb1,2,2));
$blue1 = hexdec(substr($rgb1,4,2));
$red2 = hexdec(substr($rgb2,2));
$green2 = hexdec(substr($rgb2,2));
$blue2 = hexdec(substr($rgb2,2));
return abs($red1 - $red2) + abs($green1 - $green2) + abs($blue1 - $blue2) ;
}