unit Ugetcor;
interface
uses
SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
Forms, Dialogs, StdCtrls, ExtCtrls, Buttons;
type
Tgetcol = class(TForm)
Panel1: TPanel;
Label1: TLabel;
Label2: TLabel;
procedure FormClick(Sender: TObject);
procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure Panel1Click(Sender: TObject);
procedure FormDblClick(Sender: TObject);
procedure FormResize(Sender: TObject);
private
tx,ty : integer;
procedure WMEraseBkng(var MSg:TWMEraseBkgnd);message WM_ERASEBKGND;
public
{ Public declarations }
end;
var
getcol: Tgetcol;
implementation
{$R *.DFM}
const
Digits : array[0..$F] of Char = '0123456789ABCDEF';
function HexB(B : Byte) : string;
{-Return hex string for byte}
begin
HexB[0] := #2;
HexB[1] := Digits[B shr 4];
HexB[2] := Digits[B and $F];
end;
procedure Tgetcol.WMEraseBkng(var MSg:TWMEraseBkgnd);
begin
Msg.Result:=1;
end;
procedure Tgetcol.FormClick(Sender: TObject);
var t : tcolor;
r,g,b : byte;
begin
t := canvas.pixels[tx,ty];
r := getRvalue(t);
g := getGvalue(t);
B := getBvalue(t);
LABEL2.COLOR := T;
LABEL1.CAPTION := '$00' + HEXB(R) + HEXB(G) + HEXB(B);
end;
procedure Tgetcol.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
tx := x;
ty := y;
end;
procedure Tgetcol.Panel1Click(Sender: TObject);
begin
CLOSE;
end;
procedure Tgetcol.FormDblClick(Sender: TObject);
begin
close;
end;
procedure Tgetcol.FormResize(Sender: TObject);
begin
panel1.top := height - panel1.height -1;
panel1.left := width - panel1.width -1;
panel1.visible := true;
end;
end.
只需要将其加入你的任意一个工程文件中，便可运行！！ 
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