GuiGridListGetItemColor

function createPlayerList ( )
	--Create the grid list element
	local playerList = guiCreateGridList ( 0.80, 0.10, 0.15, 0.60, true )
	--Create a players column in the list
	addEventHandler ( "onClientGUIClick", playerList, onGridListClick, false )
	local column = guiGridListAddColumn( playerList, "Player", 0.85 )
	if ( column ) then --If the column has been created, fill it with players
		for id, player in ipairs ( getElementsByType ( "player" ) ) do
			local row = guiGridListAddRow ( playerList )
			local r, g, b = getPlayerNametagColor ( player ) -- We get the player nametag color.
			guiGridListSetItemText ( playerList, row, column, getPlayerName ( player ), false, false )
			guiGridListSetItemColor ( playerList, row, column, r, g, b ) -- We set the grid list item color to the returned values of getPlayerNametagColor.
		end
	end
end
addEventHandler ( "onClientResourceStart", resourceRoot, createPlayerList )
 
function onGridListClick ( )
	local row, col = guiGridListGetSelectedItem(source)
	if ( row and col and row ~= -1 and col ~= -1 ) then
		local r, g, b, a = guiGridListGetItemColor ( source, row, col )
		outputChatBox ( "Red: ".. r, 255, 0, 0 )
		outputChatBox ( "Green: ".. g, 0, 255, 0 )
		outputChatBox ( "Blue: ".. b, 0, 0, 255 )
		outputChatBox ( "Alpha: ".. a, 255, 255, 255 )
	end
end