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Hi, I'm trying to sort an array of colors based on their group/category. But, unfortunately, the sorted colors are not linear. So here's some codes for your reference. Function: sortColors: function sortColors($colors) { $s = $hue = $sat = $val = $final = []; foreach($colors as $k => $info) { $color = $info['hex']; $hex = strtolower(str_replace('#', '', $color)); $info['hex'] = $hex; $colors[$k] = $info; list($r, $g, $b) = str_split($hex, 2); $r = hexdec($r); $g = hexdec($g); $b = hexdec($b); //$s[$k] = rgbtohsv($r, $g, $b); $s[$k] = rgbToHsl($r, $g, $b); $info['hex'] = "#$hex"; } //Split each array up into H, S and V arrays foreach($s as $k => $v) { $hue[$k] = $v['h']; $sat[$k] = $v['s']; $val[$k] = $v['l']; //$val[$k] = $v['v']; } $r = $s; $keys = array_keys($r); uasort( $r, function($a, $b) { if(!huesAreinSameInterval($a['h'],$b['h'])){ if ($a['h'] < $b['h']) return -1; if ($a['h'] > $b['h']) return 1; } if ($a['s'] < $b['s']) return -1; if ($a['s'] > $b['s']) return 1; if ($a['l'] < $b['l']) return 1; if ($a['l'] > $b['l']) return -1; return 0; } ); $i = 0; foreach($r as $k => $hsv) { $info = $colors[$k]; $hex = $info['hex']; $info['hex'] = "#$hex"; $info['hsv'] = $hsv; $final[] = $info; $i++; } return $final; } Input Array of Colors: Array ( [0] => Array ( [name] => Black [hex] => #000000 ) [1] => Array ( [name] => White [hex] => #FFFFFF ) [2] => Array ( [name] => Red [hex] => #FF0000 ) [3] => Array ( [name] => Red Devil [hex] => #860111 ) [4] => Array ( [name] => Pink [hex] => #FFC0CB ) [5] => Array ( [name] => Blue [hex] => #0000FF ) [6] => Array ( [name] => Lavender Blue [hex] => #CCCCFF ) [7] => Array ( [name] => Mint Green [hex] => #98FF98 ) [8] => Array ( [name] => Lincoln Green [hex] => #195905 ) [9] => Array ( [name] => Electric Yellow [hex] => #FFFF33 ) ) Output of the Sorted Array: Array ( [0] => Array ( [name] => White [hex] => #ffffff [rgb] => Array ( [r] => 255 [g] => 255 [b] => 255 ) [hsl] => Array ( [h] => 0 [s] => 0 [l] => 1 ) [hsv] => Array ( [h] => 0 [s] => 0 [l] => 1 ) ) [1] => Array ( [name] => Black [hex] => #000000 [rgb] => Array ( [r] => 0 [g] => 0 [b] => 0 ) [hsl] => Array ( [h] => 0 [s] => 0 [l] => 0 ) [hsv] => Array ( [h] => 0 [s] => 0 [l] => 0 ) ) [2] => Array ( [name] => Red [hex] => #ff0000 [rgb] => Array ( [r] => 255 [g] => 0 [b] => 0 ) [hsl] => Array ( [h] => 0 [s] => 1 [l] => 0.5 ) [hsv] => Array ( [h] => 0 [s] => 1 [l] => 0.5 ) ) [3] => Array ( [name] => Electric Yellow [hex] => #ffff33 [rgb] => Array ( [r] => 255 [g] => 255 [b] => 51 ) [hsl] => Array ( [h] => 60 [s] => 1 [l] => 0.6 ) [hsv] => Array ( [h] => 60 [s] => 1 [l] => 0.6 ) ) [4] => Array ( [name] => Lincoln Green [hex] => #195905 [rgb] => Array ( [r] => 25 [g] => 89 [b] => 5 ) [hsl] => Array ( [h] => 105.71429 [s] => 0.89362 [l] => 0.18431 ) [hsv] => Array ( [h] => 105.71429 [s] => 0.89362 [l] => 0.18431 ) ) [5] => Array ( [name] => Mint Green [hex] => #98ff98 [rgb] => Array ( [r] => 152 [g] => 255 [b] => 152 ) [hsl] => Array ( [h] => 120 [s] => 1 [l] => 0.79804 ) [hsv] => Array ( [h] => 120 [s] => 1 [l] => 0.79804 ) ) [6] => Array ( [name] => Lavender Blue [hex] => #ccccff [rgb] => Array ( [r] => 204 [g] => 204 [b] => 255 ) [hsl] => Array ( [h] => 240 [s] => 1 [l] => 0.9 ) [hsv] => Array ( [h] => 240 [s] => 1 [l] => 0.9 ) ) [7] => Array ( [name] => Blue [hex] => #0000ff [rgb] => Array ( [r] => 0 [g] => 0 [b] => 255 ) [hsl] => Array ( [h] => 240 [s] => 1 [l] => 0.5 ) [hsv] => Array ( [h] => 240 [s] => 1 [l] => 0.5 ) ) [8] => Array ( [name] => Red Devil [hex] => #860111 [rgb] => Array ( [r] => 134 [g] => 1 [b] => 17 ) [hsl] => Array ( [h] => 352.78195 [s] => 0.98519 [l] => 0.26471 ) [hsv] => Array ( [h] => 352.78195 [s] => 0.98519 [l] => 0.26471 ) ) [9] => Array ( [name] => Pink [hex] => #ffc0cb [rgb] => Array ( [r] => 255 [g] => 192 [b] => 203 ) [hsl] => Array ( [h] => 349.52381 [s] => 1 [l] => 0.87647 ) [hsv] => Array ( [h] => 349.52381 [s] => 1 [l] => 0.87647 ) ) ) Any help will be appreciated. Thank you.