Detect client features on connect
 

Hello i wanted to be able to detect as much information as possible about the client connecting to my server.

I'am already doing TTYPE and NAWS and that helps a lot. But what is the best way for:

See if the client supports ANSI color 16 or 256
See if the client supports UTF-8

My MUD will use formatting characters like the block and half-block so i need UTF-8 or CP437...
I wanted to see if i could use "█▄▀░▒▓" (block and half-block characters) so i can properly present the start screen (on connect) that uses them.

Thanks