If you are going RGB strip with a decent controller able to set each channel separately. Then I would definitively steer away from Blue light and stay in the white light range... I'm not sure where the blue light to mimic moonlight came from? Is it the closest thing to give a sense of darkness?
But since when you go out at a clear full moon night there is nothing blue about the moon and light it reflects.
Anyway, try to go with more natural colors preferably towards the yellow or maybe greens or browns... At very low intensities this looks much more appealing and much more natural in the way it reflects off the plants and fish... I bet once you have tried it and seen it, then blue will look very odd after that.
Take a look at
this website.
Then if you use a controller that can set the channels per percent intensity you can create any color displayed on this website pretty near the same (if you would shine the RGB light onto a white surface). Then you only need to keep dividing the percentages into equal parts down to get to the preferred intensity.
For example one of my personal favorite moonlight colors was
This is full blast intensity 100% RED - 90% GREEN - 67%BLUE. Then make this 50%, 45%, and 33% it's half the intensity but still the same color. make 25%, 22%, and 16% is 1/4 the intensity and still the same color. 12%, 11%, and 8% is 1/8 the intensity but still fairly the same color. 6%, 5%, and 4%.
If you have trouble finding a controller able to do this I can advise you to use the gold old TC420 this still uses the older version of PLED software that goes per 1 percent per channel. With this controller, it is even possible to create a moonlight effect with clouds hovering over the night sky playing with the intensities going slightly up and down, or maybe even change the color a tad while it is changing in intensities. Or go from the Dusk till dawn from Crimson Red evening sky to the slightly Orange dawn sunlight and all in between. I'm not aware of other controllers able to do this, could be more modern ones are available. But the TC420 is the only one I did this with and even tho an oldy it does a darn good job in it.