May I ask what is "Cloudy WB" is this a function on your camera. I am not familiar with the jargon use in photography
WB refers to white balance. this function is in DSLRs as well as many advanced compact camera. it basically refers to adaptation of color temperature.
light, being an energy form, comes in components of different wavelength and different energies. when there is a good mix, it is white light, and everything shine under white light will reflect its colors correctly.
but due to changes in differential absorption and reflection along a day, the color of light can fluctuate between red and blue. our eyes compensate to extreme reds and blues (when ambient, i.e. filling all around our vision, and not just an apple or a viagra pill on your hand an arm's length way) automatically to make them less reddish or bluish, but not always possible always to neutral. a sunset is still orangish to different extent in different corners of the earth.
our sensor does not have that automatic ability, except for auto-WB mode that can occasionally give you a neutral white balance when compensated correctly.
the other WB modes refer to the amount you want to push towards red or towards blue. in this case, cloudy will make something more reddish. using arbitrary values, it can make -2 becomes 0, 0 becomes 2, and 2 becomes 4. so it all depends on the lighting situation you are in, and the white balance outcome you want. not everything needs to be push back to neutral, it depends on the mood you would like to portray.
do google more on this, it is not an easy concept to grip, but i'm trying my best to summarise and not be too long winded.