Ive done way too many fish tales
A couple Ice Blue, all 3 Kelvins in white, and the right brightness in the letters...
Approx 6 different type bulbs. What I see when color is added, is all 1 SMD or brighter, and Dark Blue for Water.
sometimes buffered by Purple, or creating Purple to the eye and camera from mixing,
If one wants to add color, Im fine, please dont hate me, just spend a few bucks and add some lower brightness, or leave a few out of the backbox.
Its lighting art, and there are all kinds of "tools" in bulb selection that can make a difference.
No light bleed on colors for letters, or objects, balance the brightness in the remainder, add if your over the top, add additional Matrix strips with dimmers on them and scale back the lighting.
Create a depth of field, if you want the art to pop and get a 3D affect, in this case, the Green Fish being the brightest object.
Cameras cannot capture this, no matter how Ive tried.
All, just IMO, and my Experiences. This does not work for all Backboxes...not at all. But many,
I use Incandescent mixed with LEDs many times too.