Here is where some people get color temperature and thermal temperature confused. If the camera is set at 4500K, the picture taken with the 3000K incandescent light will be warmer. That is, it will be more on the orange/yellow end of the spectrum. The picture taken with the 6000K light source will be cooler, or more towards the blue end of the spectrum. Lower color temperature light sources produce light on the warm end of the spectrum. Higher color temperature light sources produce light on the cool end. From warm to cool the visible color spectrum runs red->orange->yellow->green->blue->indigo->violet.

Even though a blue flame is generally hotter than an orange one (it really depends on the chemical composition of the burning material and the oxidizer), we generally associate orange with heat and blue with cooler things like water. It gets even more confusing for some people because when you are editing RAW files and you change the color temperature value from 3000K to 6000K the picture gets more orange and less blue. This is because in the first case when the convertor is told the light source is 3000K it boosts the blue values to compensate for the orange light you told the convertor was illuminating the scene. When the color temperature is set for 6000K it will boost the orange/red end of the spectrum to compensate for the bluer light that illuminated the scene.