Color operators

These operators let rules and actions manipulate color attribute values. It can often convenient to tie the color of a note to its properties -- for example, to make overdue tasks bright red. For example, you can make overdue notes red, with a brightness proportional to how overdue they are.

• rgb(red,green,blue)
• brightness(color,value)
• brightness(color)
• saturation(color,value)
• saturation(color)
• hue(color,value)
• hue(color)

For example

RGB($MyRed,255,255)

Color = brightness(hue(RGB(255,0,0),120),75)

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