[Konstantinos]

COL_RED is not defined as a string but an integer.

You can use it as:

pawn Код:

#define COL_RED "{FF0000}"

...

format(string1, sizeof(string1), "* {%06x}%s(%d) " COL_RED "ended %s(%d) killstreak of %d kills!", GetPlayerColor(killerid) >>> 8, kname, killerid, pname, playerid, Kills[playerid]);