TColor to HTML color (颜色转换成 HTML 颜色代码)
TColor to HTML color
From Zarko Gajic,
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Put a TColorDialog (ColorDialog1), a TLabel (Label1) and a TButton (Button1) in your form, and assign the Button1.OnClick procedure as follows:
~~~~~~~~~~~~~~~~~~~~~~~~~
procedure TForm1.Button1Click(Sender: TObject) ;

function ColorToHtml(DColor:TColor):string;
var
tmpRGB : TColorRef;
begin
tmpRGB := ColorToRGB(DColor) ;
Result:=Format('#%.2x%.2x%.2x',
[GetRValue(tmpRGB),
GetGValue(tmpRGB),
GetBValue(tmpRGB)]) ;
end; {function ColorToHtml}

begin
if ColorDialog1.Execute then
Label1.Caption:=ColorToHtml(ColorDialog1.Color) ;
end;