1   
2   unit Unit1;
3   
4   interface
5   
6   uses
7     Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
8     Dialogs, StdCtrls;
9   
10  type
11    TForm1 = class(TForm)
12      Button1: TButton;
13      procedure Button1Click(Sender: TObject);
14    private
15      { Private declarations }
16    public
17      { Public declarations }
18    end;
19  
20  var
21    Form1: TForm1;
22  
23  implementation
24  
25  {$R *.dfm}
26   function ColorToHTMLColor(Color: TColor): string;
27  begin
28    Result := IntToHex(ColorToRGB(Color), 6);
29    Result :=  '#' + Copy(Result, 5, 2) + Copy(Result, 3, 2) + Copy(Result, 1, 2);
30  end;
31  
32  
33  procedure TForm1.Button1Click(Sender: TObject);
34  begin
35     ShowMessage( ColorToHTMLColor(clYellow));
36  end;
37  
38  end.