zoran said:
On a dull day my photos come out blueish... what might be the reason for this, some setting?

Some setting - yes. It's called white balance. The camera measures the scene, and tries to adjust colors so that everything is an even color temperature. You might have it set so the camera is compensating for warm color temps. It is "cooling" down the scene, making it look blue. I suspect it's set to tungsten.

Auto white balance, on a decent camera will adjust for this most of the time and make everything look right, unless you have a mixed scene that has more than one source of light. Example; muted daylight through a window and tungsten light through a doorway, or flash and tungsten light mixed, etc.

The best way to adjust for white balance is use the custom pre-set feature on the camera and shoot a grey card or at least a neutral white surface. (painted door, wall, etc) that has an average of the scene's lighting.

Google "white balance" and "color temperature" and read up on it. Understanding how a camera handles color will improve your pics.

Note: all of this applies to how the camera handles color when it's processing a finished jpg in the camera. If you shoot raw, you can re-adjust all of this after the fact when post processing the images.

Auto white balance is your friend Zoran...

What is your White Balance setting?

Did you use a Grey Card?

On a dull day my photos come out blueish... what might be the reason for this, some setting?