Challenging lighting result

[fixeighted]

I couldn't decide where to put this post so I stuck it here as I'm in a rush

So, I've been doing a bunch of these saunas that have interior lighting and the issue is that they keep on changing their mind about the light colour.
For whatever reason they have switched yet again and want the dark blue as in the attached image.

This is proving extremely challenging so any ideas?

You'll notice that the blue and the red are very saturated and, crucially, do not show the white light at the bottom that transitions to the colour light as seen here.
I have recreated loads of different shades based on reference and they look exactly right, with this white/to colour transition, when using yellow, green, aquamarine and others, although even then it's not a simple matter to get the correct colour/intensity.
But I cannot get that deep saturation with the dark blue (or red), so why not is the question?

I suspect that the cameraphone used may filter the light in some way to achieve that depth, though I have no idea how I'd recreate it in the render itself, if possible.

The nearest I have got is by using filmic and playing with the values to somewhat match it but it's really not the same.

[caypiranha]

I don't think, the "white light" will appear on the other colors. Especially when they are really fully saturated. You will only burn everything in exact this color you choose. I am dimming them down until the burnout border is left into it´s most soft gradient it could have.
it should be fine then. Digital Fotos (like renderings as well) are having this problem. A naturally blue could lead - being photographed - into a UV-light like appearance with harsh Pink overdrive as well... so if you desaturate the blue only a bit for instance, you may encounter the same thing as shown on the violet example - but with still blue environment. work with light spread and maybe falloff gradients helping for more "light" along the walls (self-illum)

this thread may be placed to general discussions..? =)

[fixeighted]

I think what I meant is that in the image, all are photos taken with the same camera but show different results based on the particular colour. Every other colour shade that I have rendered turns out exactly like any different reference I can see online and the same as in the attachement showing the violet and green and other lighter shades...It's just the dark blue/dark red that don't come out as expected.

Unfortunately I cannot see these in reality so can't judge for myself.

[Muhammed_Hamed]

The clipped highlights for Blue/Red in reference don't look great, the bottom part is completely cut off. Gonna need something fancy to capture then view this in a better way
In CGI, fully saturated lights are bad for RGB renderers(without ACES), they should never be used because having one or two empty channels in calculating lighting/shading.. it never ends well, it affects bouncing of light and will cause bad global illumination.
There should be a limit on how saturated you push your lights (unless you use ACES, and still you gonna have to deal with hue skews as they call it)
Best is to fake this gradient at the bottom part in rendering(more brightness and slightly less saturated towards the bottom) .. unless the client wants it completely clipped like the reference, in this case it will be an easier task

[fixeighted]

I agree, they look weird and if I push any cc, like weird filmic settings, purely to try to achieve that look, then it just looks like I did a really bad job in post.
The client is sadly extremely bad at communicating what they want, mostly providing just vague terminology
which does nothing to help.

I made an executive decision and kept the highlights, which results in a certainly less 'in your face' saturation
but a more believeable (at least to me) result, which happily also matches all the other colour variations I have done.

They seem to operate 'feedback by committee' so who knows what they actually want