color_mode.php

<?php
$avail_modes = ["dark", "bright"];

$MODE = array_key_exists("VATGER_BOOKING_MODE", $_COOKIE) ? $_COOKIE["VATGER_BOOKING_MODE"] : false;

foreach ($avail_modes as $mode) {
    if (isset($_GET["set_mode_$mode"])) {
        if (setcookie("VATGER_BOOKING_MODE", $mode, time()+60*60*24*30*3)) {
            $MODE = $mode;
        }
    }
}

if (empty($MODE) || !in_array($MODE, $avail_modes)) $MODE = "bright";

$colors_bright = [
    "background" => [240, 240, 240],
    "black" => [0, 0, 0],
    "gray" => [190, 190, 190],
    "red" => [190, 40, 40],
    "blue" => [072, 118, 255],
    "orange" => [255, 140, 0],
];

$colors_dark = [
    "background" => [23,23,23],
    "black" => [230, 230, 230],
    "gray" => [100, 100, 100],
    "red" => [190, 40, 40],
    "blue" => [072, 118, 255],
    "orange" => [255, 140, 0],
];

$all_colores = [
    "dark" => $colors_dark,
    "bright" => $colors_bright
];

define("_COLOR_MODE_", $MODE);
define("_COLOR_MODES_AVAIL_", $avail_modes);
define("_COLORS_ALL_", $all_colores);

function get_color_in_mode($im, string $identifier) : false|int
{
    $c = _COLORS_ALL_[_COLOR_MODE_][$identifier];
    return imagecolorallocate($im, $c[0], $c[1], $c[2]);
}