<?php
class FmColour {
    private $raw = null;

    public function __construct(?int $raw) {
        $this->raw = $raw;
    }

    public function hasColour(): bool {
        return $this->raw !== null;
    }

    public function getRaw(): int {
        return $this->raw ?? 0;
    }

    public function getRed(): int   { return ($this->getRaw() >> 16) & 0xFF; }
    public function getGreen(): int { return ($this->getRaw() >>  8) & 0xFF; }
    public function getBlue(): int  { return  $this->getRaw()        & 0xFF; }

    public function getHex(): string { return str_pad(dechex($this->getRaw()), 6, '0'); }

    public function getCSS(): string {
        if(!$this->hasColour())
            return 'inherit';
        return '#' . $this->getHex();
    }
}