Digital Camera White Balance, Colors, Gray Card

I'm new to digital cameras and gray cards. My Canon A510 seems accurate
about 90% of the time in colors weather I use auto white balance or one of
the preset white balances.
As an experiment, I printed out a gray card on my printer. I used windows
Paint and set the colors to 127,127,127. It printed out a medium shade of
gray. I used this as a test gray card on the camera. Now the colors are dead
on 100% accurate in the sun, shade, indoors, dim light, when I use the gray
card.

Question is, how accurate is the white balance and colors in your point and
shoot camera? Do you ever use a gray card?

 

Not bad at all most of the time.
Yes.

 

Pete wrote
(in article

I use one of these, indoors or out, and it makes a big
difference over the camera settings, and it's easy. Just shoot
an extra frame at the start or end of each string in the same
light.

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