Custom Delphi Colours

Question

If i want to set a colour property to something thats non-standard (i.e. not something like clBlack or clRed) how can i do this? Can i set something like hexadecimal colours?

Dissipation

Answer 1

RGB in Windows.pas

function RGB(r, g, b: Byte): COLORREF;

you can cast the result to be a TColor.

e.g

MyColour := TColor(RGB(Red,Green,Blue));

Pulsometer

Normally, casting is done implicitly. A COLORREF and a TColor both are 32-bit integers. Hence, MyColour := RGB(Red,Green,Blue); will work just fine. – Sandpiper

Answer 2

you can use $00BBGGRR

BB = Blue
GG = Green
RR = Red

All these values can be between 0 and 255 ($00 and $FF)

Leomaleon

I tried this, but it worked for me only if I used $FF on the beginning - so $FFBBGGRR – Idolatrize

@Asped: No, the highest byte in the DWORD should be 0 for a normal colour. But maybe you are using colours with an alpha channel? If so, $FF is probably full opacity. But alpha isn't normally used in Win32 GDI. – Sandpiper

Answer 3

I always used RGB macro: http://delphi.wikia.com/wiki/RGB

Superfine

Answer 4

You might also want to check Colors in Delphi help page. If might be useful for Delphi developers who do web programming because Vcl.Graphics unit defines TColor values as clWeb____ web-friendly constants.

Many constants are already predefined and before you use them you can visually see how the colors look like. So there is no need to do RBG "mixes".

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