Writing colors

You can use:

Constants:

clAqua, clBlack, clBlue, clCream, clDkGray, clFuchsia, clGray, clGreen, clLime, clLtGray, clMaroon, clMedGray, clMoneyGreen, clNavy, clOlive, clPurple, clRed, clSilver, clSkyBlue, clTeal, clWhite, clYellow.
Note: "Dk" stands for dark, "Lt" stands for light, and "Med" stands for medium.

4-byte hexadecimal numbers:

The low three bytes represent RGB color intensities for blue, green, and red, respectively.
The value $00FF0000 represents full-intensity, pure blue, $0000FF00 is pure green, and $000000FF is pure red.
$00000000 is black and $00FFFFFF is white.

If the highest-order byte is zero ($00), the color obtained is the closest matching color in the system palette.
If this byte is one ($01), the color obtained is the closest matching color in the currently realized palette.
If this byte is two ($02), the value is matched with the nearest color in the logical palette of the current device context.