alpha(
COLOR
)
The alpha( function extracts the alpha (opacity) from a color.
Parameters
This function has one parameter:
color – is the color you want to extract information from. This must either be a binary value created with the rgb(, hsb(, or other color generation functions, or must be an HTML color specification like "FF0000 (red) or "0000FF (blue). See Colors for more information.
Description
This function extracts the alpha (opacity) from a color.
The example below calculates the opacity of the color (in percent, from 0 to 100%).
Opacity = alpha(HighlightColor)* 100 / 65535
For more examples of color, see Colors.
See Also
- black( -- returns black as a Panorama color value (see Colors).
- blue( -- extracts the blue intensity from a color.
- brightness( -- extracts the brightness from a color.
- Colors -- Using colors in Panorama formulas and procedures.
- colorwheel -- allows the user to pick a color using the operating systems standard color picker dialog
- formcolor -- changes the background color of the current form.
- getwebcolor( -- calculates an RGB color from a Netscape style web color.
- gray( -- returns a shade of gray as a Panorama color value (see Colors).
- green( -- extracts the green intensity from a color.
- hsb( -- creates a color by combining hue, saturation, and brightness components. See Colors.
- htmlcolor( -- converts a color name into a hex HTML color (RRGGBB format).
- htmlcolorarray( -- generates a text array of HTML colors that gradually transition from one color to another.
- htmlrgb( -- converts text formatted as an HTML color into a Panorama color value (see Colors).
- htmlrgbstr( -- converts a color to text formatted as an HTML color.
- hue( -- extracts the hue from a color.
- info("colornames") -- returns a list of color names that can be used as a text object background and with the htmlcolor( function.
- info("formcolor") -- returns the background color of the current form.
- red( -- extracts the red intensity from a color.
- rgb( -- creates a color by combining red, green, and blue primary colors. See Colors.
- rgbstr( -- converts a color into text in the format *red,green,blue*.
- saturation( -- extracts the saturation from a color.
- white( -- returns white as a Panorama color value (see Colors).
History
| 10.0 | New | New in this version |