They're not obvious visually when they switch from the white emitter, which has "some blue" to the RGB emitters, which have "lots of blue" as you head out in the red/orange spectrum, but your body's "blue sensors" certainly notice.
Unfortunately, our visual system isn't sensitive to the same things our melatonin inhibiting system is sensitive to, so without a spectrometer, you can't really tell what you're seeing.
But in terms of your body's melatonin production and sleep, the Philips smart bulbs can get very peaky in terms of blue, in the range that matters.
https://www.sevarg.net/2023/03/11/philips-smart-wifi-bulbs/
They're not obvious visually when they switch from the white emitter, which has "some blue" to the RGB emitters, which have "lots of blue" as you head out in the red/orange spectrum, but your body's "blue sensors" certainly notice.
Unfortunately, our visual system isn't sensitive to the same things our melatonin inhibiting system is sensitive to, so without a spectrometer, you can't really tell what you're seeing.