Defines the alpha channel of this Color. The alpha channel of a Color structure determines the amount of transparency the color has. An alpha value of 1 indicates the color is completely opaque, and a value of 0 indicates that it is completely transparent.
ScB (required)
The blue component of this Color. The value is a single precision floating-point number. The range of this value is 0-1, inclusive.
ScG (required)
The green component of this Color. The value is a single precision floating-point number. The range of this value is 0-1, inclusive.
ScR (required)
The red component of this Color. The value is a single precision floating-point number. The range of this value is 0-1, inclusive.