Back in 2013 I took some photos of Betelgeuse, Aldebaran, and Rigel to do a color comparison. One really simple technique to get a better look at the apparent color is to intentionally take a photo out of focus - this spreads the light of the star over more pixels on the image sensor, which not only makes the star look larger, but also helps to avoid undersampling with a Bayered sensor.
|Out of focus star photos with 300mm lens showing star colors|
|In the video, my star images fly out from the constellation Orion, cool!|
|Star color images compared to the parts of a candle flame in this screenshot from the video.|