colorm.go
func ScaleColor(r, g, b, a float64) ColorM {
	c := ColorM{}
	c.Scale(r, g, b, a)
	return c
}
func ScaleColor(r, g, b, a float64) ColorM {
	c := ColorM{}
	c.Scale(r, g, b, a)
	return c
}
// ScaleColor is deprecated as of 1.2.0-alpha. Use Scale instead.