Tiny script to create solid color images using PHP and GD Library for https://colorswatches.info - blog post at https://compsci.rocks/solid-color-image-in-php/

colorImage.php

<?php
$red = 100;
$blue = 150;
$green = 200; 
$my_img = imagecreate( 1000, 1000 );
$background = imagecolorallocate( $my_img, $red, $green, $blue );
header( "Content-type: image/png" );
imagepng( $my_img );
imagecolordeallocate( $my_img, $background );
imagedestroy( $my_img );
die();