Function ColorRGBA

ColorRGBA(r: number, g: number, b: number, a?: number): Color
One of the many available factories for Color. This variant receives individual values for red, green, blue, and optionally alpha channels. Input values are in range [0, 255].

Example usage:
```
 // Create Color from RGB [0, 255] values (completely red).
 const color = ColorRGBA( 255, 0, 0 )

// Create transparent Color.
const transparentColor = ColorRGBA( 255, 0, 0, 127 )
```
For more convenience factories, see:
Returns
Color object. Please refer to Color API document, on extended information how to use LCJS Colors.
Parameters
- r: number
  
  Red from 0 to 255
- g: number
  
  Green from 0 to 255
- b: number
  
  Blue from 0 to 255
- a: number = 255
  
  Alpha from 0 to 255 (can be omitted, defaulting to 255)
Returns Color