when you execute:
/tellraw @a ["",{"text":"Click","clickEvent":{"action":"suggest_command","value":"§a Color!"}}]
MCEdit is needed for this
in a command block, you will be able to get the color symbol ( § ) in the chat bar. But once you press enter to send the colored message the game freezes.
Console:
[17:00:31] [Client thread/INFO]: Setting user: RedstoneMAN72
[17:00:31] [Client thread/INFO]: (Session ID is token:f8d62a39934441858ed726d1dbd53984:02acf84892da4fdbb8356944e48290b8)
[17:00:32] [Client thread/INFO]: LWJGL Version: 2.9.4
[17:00:33] [Client thread/INFO]: Reloading ResourceManager: Default, faithful32pack
[17:00:33] [Sound Library Loader/INFO]: Starting up SoundSystem...
[17:00:33] [Thread-6/INFO]: Initializing LWJGL OpenAL
[17:00:33] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[17:00:34] [Thread-6/INFO]: OpenAL initialized.
[17:00:34] [Sound Library Loader/INFO]: Sound engine started
[17:00:35] [Client thread/INFO]: Created: 1024x1024 textures-atlas
[17:00:38] [Server thread/INFO]: Starting integrated minecraft server version 15w34b
[17:00:38] [Server thread/INFO]: Generating keypair
[17:00:38] [Server thread/INFO]: Preparing start region for level 0
[17:00:39] [Server thread/INFO]: Changing view distance to 25, from 10
[17:00:41] [Server thread/INFO]: RedstoneMAN72[local:E:d2fd48c3] logged in with entity id 0 at (-2050.9861492590376, 2.0, 58.4012200718809)
[17:00:41] [Server thread/INFO]: RedstoneMAN72 joined the game
[17:00:46] [Client thread/INFO]: [CHAT] Click to get COLOR!
[17:00:50] [Server thread/INFO]: RedstoneMAN72 lost connection: TextComponent{text='Illegal characters in chat', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[17:00:50] [Server thread/INFO]: RedstoneMAN72 left the game
[17:00:50] [Server thread/INFO]: Stopping singleplayer server as player logged out
[17:00:50] [Server thread/WARN]: handleDisconnection() called twice
[17:00:50] [Server thread/INFO]: Stopping server
[17:00:50] [Server thread/INFO]: Saving players
[17:00:50] [Server thread/INFO]: Saving worlds
[17:00:50] [Server thread/INFO]: Saving chunks for level '1.9 NBT Signs'/Overworld
[17:00:50] [Server thread/INFO]: Saving chunks for level '1.9 NBT Signs'/Nether
[17:00:50] [Server thread/INFO]: Saving chunks for level '1.9 NBT Signs'/The End
Attachments
Comments

Use the color tag in tellraw.
MCEdit is needed for this
That's a 3th party program, and using it is not supported

Duplicates or relates to MC-79818
It doesn't freeze, it kicks you:
Don't use §