code: static double rgb( int r, int g, int b ) {
          return Double.longBitsToDouble( Expression.ALPHA_1 | (colorLargeDigit(r) << 32) | (colorLargeDigit(g) << 16) | colorLargeDigit(b) );
      }
docs: Create an color value.
  
  @param r
  red in range from 0 to 255
  @param g
  green in range from 0 to 255
  @param b
  blue in range from 0 to 255
  @return color value as long