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unit ValueToColor;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Buttons;

type
  TForm5 = class(TForm)
    edt1: TEdit;
    edt2: TEdit;
    lbl1: TLabel;
    edt3: TEdit;
    lbl2: TLabel;
    edt4: TEdit;
    lbl3: TLabel;
    btn1: TBitBtn;
    procedure btn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form5: TForm5;

implementation

{$R *.dfm}

procedure TForm5.btn1Click(Sender: TObject);
var
R,G,B:Byte;

begin
      R:= StrToInt(edt2.Text);
      G:= StrToInt(edt3.Text);
      B:= StrToInt(edt4.Text);
      edt1.Color := RGB(R,G,B);
end;

end.