[GTLS]

They are Color Tags. Used like, for eg

Код:

 SendClientMessage(playerid, -1, "{000000}Hello.");//This will display Hello in Black. You can use HTML Color Pickers online to get exact color shades.

EDIT: Also, tell me what is Check, before the player's name? If its constant, you can use,

Код:

 SendClientMessageEx(playerid, COLOR_NAME, "(({COLOR_CODE}Check {COLOR_NAME_CODE} %s Says: %s",GetPlayerName(playerid), params); //replace COLOR_NAME with your color,  COLOR_CODE with the color you want Check to be displayed and replace COLOR_NAME_CODE to Color Code of the color you used as COLOR_NAME.

Код:

//How to get Color codes from name?
#define COLOR_RED (0xFF0000FF) //0xRRGGBBAA
#define COLOR_RED_CODE "FF0000" //RRGGBB