What is the red white and blue star in the western sky at night lately?

I viewed this star at about 11:00 pm PT. my position is 35 deg 26' N 119 deg 1' W. My 100X telescope from my perspective was facing due west and was angled around 50 degrees ( alittle higher in the sky than a 45 deg angle. You can't miss it it is very bright (one of the 2 or 3 brightest in the sky) and changes every few seconds from yellow to red, white and blue. A very beautiful sight to see. Might be Sirius but I've never noticed it until of late. It seems to be stationary( ie I had to adjust the telescope slightly north and lower on the horizon every few seconds to keep it in view like the other stars. It's not an aircraft or a light on top of a radio tower.