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#56: To play with colors

Sometimes in run-time you need play with colors. For example, you have the some color value and you want to make it more dark or light. The next two function were written for it.

function Dark(Col: TColor; Percent: Byte): TColor;
var R, G, B: Byte;
begin
  R := GetRValue(Col);
  G := GetGValue(Col);
  B := GetBValue(Col);
  R := Round(R*Percent/100);
  G := Round(G*Percent/100);
  B := Round(B*Percent/100);
  Result := RGB(R, G, B);
end;

function Light(Col: TColor; Percent: Byte): TColor;
var R, G, B: Byte;
begin
  R := GetRValue(Col);
  G := GetGValue(Col);
  B := GetBValue(Col);
  R := Round(R*Percent/100) + Round(255 - Percent/100*255);
  G := Round(G*Percent/100) + Round(255 - Percent/100*255);
  B := Round(B*Percent/100) + Round(255 - Percent/100*255);
  Result := RGB(R, G, B);
end;

Published: December 30, 1999

See also

	Paradox to MS Access converter
	SMImport suite
	DBLoad
	SMMsg suite
	Fast Document Viewer
	ABA Document Convert
	DBExport tools
	Metafile Convert
	Viewer for MS Outlook Messages
	Excel Reader (dll)

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