public static ColorRGBA fromRGBA255(int r, int g, int b, int a) {
        return new ColorRGBA(r / 255.0F, g / 255.0F, b / 255.0F, a / 255.0F);
    }
Converts a color from RGBA 255 values.
@param r the red value in 0-255 range.
@param g the green value in 0-255 range.
@param b the blue value in 0-255 range.
@param a the alpha value in 0-255 range.
@return the ColorRGBA equivalent of the RGBA 255 color.
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java