How can I change the chatbox color?

What would you like to change on the chatbox regarding color? I can supply some selectors for the stylesheet however,
since I do not know precisely what you wish to edit this is all I will provide for the current.

 Chatbox rows(message rows):

Code:

.chatbox_row_1
.chatbox_row_2

Chatbox Members:

Code:

#chatbox_members
.member-title

Chatbox Header/Footer:

Code:

#chatbox_header
#chatbox_footer

Main Chat:

Code:

#chatbox
.chatbox

Text Input:

Code:

#chatbox_footer label

I would like to change the main chat

Where Install The Code
I means i dont undarstand how change color
where use this code ??

Administration Panel > Display > Colors & Pictures > Colors
CSS Stylesheet Tab

No Work In Php3 Forum ?

Alright thx for the help and solved