complementary color calculator

complementary_calculator.cs

using System;
					
public class Program
{
	public static void Main()
	{
		int[] rgb_color = new int[]{255, 0, 255};
		string hex_color = "#FF00FF";
		Console.WriteLine(calculate(hex_color));
		int[] x = calculate(rgb_color);
		Console.WriteLine("" + x[0]);
		Console.WriteLine("" + x[1]);
		Console.WriteLine("" + x[2]);
	}

	public static int[] calculate(int[] color) {
	  return new int[] {255 - color[0], 255 - color[1], 255 - color[2]};
	}

	public static string calculate(string color) {
	  return "#" +
	  (255 - Convert.ToInt32(color.Substring(1, 2), 16)).ToString("X2") +
	  (255 - Convert.ToInt32(color.Substring(3, 2), 16)).ToString("X2") +
	  (255 - Convert.ToInt32(color.Substring(5, 2), 16)).ToString("X2");
	}
}

complementary_calculator.js

var rgb_color = [255, 0, 255];
var hex_color = '#FF00FF';

function calculate(color, hex = false) {
  if (hex) {
    return '#' +
      ("0" + (255 - parseInt(color.substring(1, 3), 16)).toString(16)).slice(-2) +
      ("0" + (255 - parseInt(color.substring(3, 5), 16)).toString(16)).slice(-2) +
      ("0" + (255 - parseInt(color.substring(5, 7), 16)).toString(16)).slice(-2);
  } else {
    return [(255 - color[0]), (255 - color[1]), (255 - color[2])];
  }
}

console.log(calculate(rgb_color));
console.log(calculate(hex_color,true));

complementary_calculator.php

<?php
$rgb_color = [255, 0, 255];
$hex_color = '#FF00FF';

function calculate($color, bool $hex = false) {
  if ($hex) {
    return '#' .
      str_pad(dechex(255 - hexdec(substr($color, 1, 2))), 2, '0', STR_PAD_LEFT) .
      str_pad(dechex(255 - hexdec(substr($color, 3, 2))), 2, '0', STR_PAD_LEFT) .
      str_pad(dechex(255 - hexdec(substr($color, 5, 2))), 2, '0', STR_PAD_LEFT);
  } else {
    return [(255 - $color[0]), (255 - $color[1]), (255 - $color[2])];
  }
}

print_r(calculate($rgb_color));
print_r(calculate($hex_color, true));

complementary_calculator.py

rgb_color: list = [255, 0, 255]
hex_color: str = '#FF00FF'

def calculate(color, hex: bool =  False, **kwargs):
  if hex:
    return '#' +
      format(255 - int(color[1:3], 16), '02x') + 
      format(255 - int(color[3:5], 16), '02x') +
      format(255 - int(color[5:7], 16), '02x')
  else:
    return [255 - x for x in color]

print(calculate(rgb_color))
print(calculate(hex_color, True))