colors!

commands/Information/color.js

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+const { RichEmbed } = require('discord.js');
+
+const rgbToHSL = (red, green, blue) => {
+	let r = red / 255;
+	let g = green / 255;
+	let b = blue / 255;
+
+	let max = Math.max(r, g, b), min = Math.min(r, g, b);
+	let h, s, l = (max + min) / 2;
+
+	if (max == min) {
+		h = s = 0;
+	} else {
+		let d = max - min;
+		s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
+		switch (max) {
+		case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+		case g: h = (b - r) / d + 2; break;
+		case b: h = (r - g) / d + 4; break;
+		}
+		h /= 6;
+	}
+
+	h = Math.round(h * 360);
+	s = Math.round(s * 100);
+	l = Math.round(l * 100);
+
+	return { hue: h, saturation: s, lightness: l };
+};
+
+const resolveColor = input => {
+	if (input.startsWith('#')) input = input.substr(1);
+	if (input.length === 3) input = input.split('').map(c => c + c).join('');
+
+	let hex = input;
+	let [red, green, blue] = [hex.substr(0, 2), hex.substr(2, 2), hex.substr(4, 2)]
+		.map(value => parseInt(value, 16));
+	let { hue, saturation, lightness } = rgbToHSL(red, green, blue);
+
+	return { hex, red, green, blue, hue, saturation, lightness };
+};
+
+exports.run = async (client, message, args, level) => {
+  if (args.length < 1) {
+		(await message.reply('please provide a color.')).delete(5000);
+		return message.delete();
+	}
+
+	if (!/^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$/.test(args[0])) {
+		(await message.reply('the color must be in the format of `#RRGGBB` or `#RGB`.')).delete(5000);
+		return message.delete();
+	}
+
+	let color = resolveColor(args[0]);
+
+	message.delete();
+	message.channel.send({
+		embed: new RichEmbed()
+			.setDescription(`Hex: \`#${color.hex}\`\nRGB: \`${color.red}, ${color.green}, ${color.blue}\`\nHSL: \`${color.hue}, ${color.saturation}, ${color.lightness}\``)
+			.setImage(`http://placehold.it/500/${color.hex}/${color.hex}`)
+			.setColor(`${color.hex}`)
+	});
+};
+
+exports.conf = {
+  enabled: true,
+  guildOnly: false,
+  aliases: ["hex","rgb"],
+  permLevel: "User"
+};
+
+exports.help = {
+  name: "color",
+  category: "Information",
+  description: "Shows some information and a preview of a specified hex color.",
+  usage: "color <hex>"
+};