how do you make big letters and colored letters

[harley49]

i need help can you help me make big letters and colored letters

[Ad Bot]

[Slicksilver555]

I'm not even going to bother explaining it.
<color:hexcode> <font:fontname:sizept>
<color:FF0000> <font:arial:10pt> Makes red text like this.

[harley49]

i mean in the chat