Method

RGB

Warning

This item was deprecated in version 2019r2. Please use Color.RGB as a replacement.

Description

Returns a Color based on the red, green, blue, and alpha values specified. You can also specify a color using the Color.HSV or Color.CMY function or the &c color constant, &c constructor to create pictures that support the alpha channel or convert existing pictures to the new format using the code described in HasAlphaChannel.

Usage

result=RGB(red, green, blue, [alpha = 0])

Part	Type	Description
result	Color	An object that represents the color based on the red, green, blue, and alpha values.
red	Integer	The amount of red in the color (0-255).
green	Integer	The amount of green in the color (0-255).
blue	Integer	The amount of blue in the color (0-255).
alpha	Integer	The amount of translucency of the color (0 - 255 ). The value of zero is opaque and 255 is transparent. The default is zero (opaque).

Notes

The RGB function returns a color object based on the amounts of red, green, blue, and transparency passed. These amounts are represented by integers between 0 and 255.

You can also specify a color using the RGB model using the &c literal. With the &c literal, you specify the amounts of red, green, blue, and transparency in hexadecimal rather than decimal.

Transparency

The following example draws sample color patches in a Canvas with varying levels of transparency. With the RGB function, the range is from 0 to 255. Zero is completely opaque and 255 is completely transparent. The code is in the Paint event.

g.ForeColor =Color.RGB(255, 0, 0, 0)  ' red color patch, no transparency
g.DrawRect(0, 0, 200, 50)

g.FillRect(0, 0, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0) ' black text
g.DrawString("Translucent = 0", 210, 10)

g.ForeColor =Color.RGB(255, 0, 0, 77) ' transparency = .3

g.FillRect(0, 70, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0, 0)
g.DrawString("Translucent = 30%", 210, 80)

g.ForeColor =Color.RGB(255, 0, 0, 127) ' transparency = .5

g.FillRect(0, 140, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0)
g.DrawString("Translucent = 50%", 210, 150)

g.ForeColor =Color.RGB(255, 0, 0, 179) ' transparency = .7

g.FillRect(0, 210, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0)
g.DrawString("Translucent = 70%", 210, 220)

g.ForeColor =Color.RGB(255, 0, 0, 229) ' transparency = .9

g.FillRect(0, 280, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0)
g.DrawString("Translucent = 90%", 210, 290)

The result is shown here.

Sample code

This example uses the RGB function to assign various colors and levels of transparency to the ForeColor property of a Canvas control. The code is in the Paint event.

g.ForeColor =Color.RGB(0, 0, 0, 0) ' set to black
g.ForeColor =Color.RGB(255, 0, 0, 0) ' set to red
g.ForeColor =Color.RGB(255, 255, 255, 0) ' set to white

This example draws three red rectangles with varying levels of transparency. The code is in the Paint event of a Canvas or a Window.

g.ForeColor =Color.RGB(255, 0, 0, 0)
g.DrawRect(0, 0, 200, 50)

g.FillRect(0, 0, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0)
g.DrawString("Translucent = 0", 210, 10)

g.ForeColor =Color.RGB(255, 0, 0, 100) ' transparency = 100

g.FillRect(0, 70, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0, 0)
g.DrawString("Translucent = 100", 210, 80)

g.ForeColor =Color.RGB(255, 0, 0, 200) ' transparency = 200

g.FillRect(0, 140, 200, 50)
g.ForeColor =Color.RGB(0, 0, 0, 0)
g.DrawString("Translucent = 200", 210, 150)

Compatibility

All project types on all supported operating systems.

RGB