Probably you have got changed team colors:
Remove these cvars to back to default or paste them with original colors.PHP Code:
setCvar("g_TeamColor_Allies", ".25 .75 .25");
setCvar("g_TeamColor_Allies", ".25 .25 .75");
setCvar("g_TeamColor_Allies", ".75 .25 .25");
setCvar("g_TeamColor_Axis", ".6 .6 .6");
Source: iw_07.iwd\maps\mp\gametypes\_scoreboard.gsc