How to add colored signs in a minecraft server?

I want to add colored signs to my minecraft server. I downloaded it from minecraft.net.

Download Essentials http://www.curse.com/bukkit-plugins/minecraft/essentials

And then you will be able to put colors on signs by doing &<number>

Each color has it's own number and here's a list of the color format: http://minecraft.gamepedia.com/...ting_codes

You can only make coloured signs by having a modded (bukkit or equivalent) server.

bukkit.org
and the plugin TwinTowers99 said.