This is my colorme command for my bot MopBot.

colorme.js

const misc = require('../../Functions/misc');

exports.exec = (message, bot, suffix, param) => {
  let colors = {
    red: "#ff0000",
    darkred: "#730000",
    pink: "#FC10EC",
    orange: "#ff7300",
    yellow: "#ffff00",
    blue: "#0000ff",
    darkblue: "#000577",
    lightblue: "#00d1ff",
    turquoise: "#00ffb3",
    green: "#00ff00",
    darkgreen: "#00af17",
    lightgreen: "#9aff4b",
    purple: "#9000d4",
    magenta: "#400245",
    black: "#100000",
    gray: "#8e8b8c",
    white: "#ffffff"
  };
  if (param[1] === "reset") {
    message.member.roles.forEach(r => {
      if (r.name.startsWith('colorme=')) {
        if (r.members.size === 1) r.delete();
        if (r.members.size > 1) message.member.removeRole(r);
      }
    });
    return;
  }
  if (!colors.hasOwnProperty(param[1])) return misc.sendError(message, "That is not a valid color. \nTry: red | darkred | pink | orange | yellow | blue | darkblue | lightblue | turquoise | green | darkgreen | lightgreen | purple | magenta | black | gray | white", 10000);
  if (message.guild.member(bot.user).highestRole.position > message.member.highestRole.position) {
    let memroles = message.member.roles.filter(r => r.name.startsWith('colorme='));
    if (memroles.size > 0) memroles.forEach(r => {
      if (r.members.size === 1) r.delete();
      if (r.members.size > 1) message.member.removeRole(r);
    })
    if (message.guild.roles.exists('name', 'colorme=' + param[1])) {
      let r = message.guild.roles.find('name', 'colorme=' + param[1])
      if (r.position > message.member.highestRole.position) {
        return message.member.addRole(r);
      } else {
        r.setPosition(message.member.highestRole.position + 1);
        return message.member.addRole(r);
      }
    } else {
      message.guild.createRole({
        name: "colorme=" + param[1],
        color: colors[param[1]].toUpperCase()
      }).then(r => {
        r.setPosition(message.member.highestRole.position + 1).catch(err => console.log(err))
        message.member.addRole(r);;
      });
    }
    let clean = message.guild.roles.filter(r => r.name.startsWith('colorme='));
    clean.forEach(r => {
      if (r.members.size === 0) r.delete();
    })
  } else {
    misc.sendWarn(message, "I cannot make a role higher than yours.", 5000)
  }
}

exports.conf = {
  coolDown: 500,
  category: "Fun",
  alias: "cme",
  deleteCommand: true,
  perm: 0,
  botPerm: ["SEND_MESSAGES", "MANAGE_ROLES_OR_PERMISSIONS"]
}

exports.help = {
  help: "Change the color of your name",
  helpExt: "Creates a new role thats positioned above your highest role, to change the color of your name. Available colors: \n`red | darkred | pink | orange | yellow | blue | darkblue | lightblue | turquoise | green | darkgreen | lightgreen | purple | magenta | black | gray | white`",
  args: "<color>"
}