Define your custom TColor type in Delphi

Do define your own custom color in Delphi, do this:

const
  clChartRed = TColor($B3B3FF);       // 70 % gradient Red on White
  clChartYellow = TColor($B3FFFF);    // 70 % gradient Yellow on White

But remember that Delphi defines the colors as BGR and not the usual RGB so remember to swap numbers.
So the color red would be:

const
  clRed = TColor($0000FF);       // Red