how many leds do you have and how did you Inject the power?
Iff there's a power drop then the colours especially the whites will turn out yellowish
What type SK6812 are you using WW,NW or CW?
I run SK6812 RGBW-NW hyperion and ESP32 with WLED there is deeper setting for WHITE LED, and much more.
regards pclin
The most important question is which varient of the (W) did you get? I have NW for natural white and I feel my white is spot on, it also helped a ton to have NW when calibrating the other colors especially yellow and aqua.
If you have WW (warm white) itll be more yellowy/orange and CW (cool white) itll be more blueish.
I'll beg to differ this...
the most important is the PSU and the way how he injected the power in the strip.
How much leds, what voltage ⚡️ and what is the power drop after 150 leds or so...
If voltage thus current isn't correct you never get a satisfactory colour scheme out of your ledstrip.
Settings in hyperion alone isn't going to cut it then.
note, vitman
A tip of mine is to lower down the brightness of the leds to 30%
If the leds going to shine ✨️ bright whites but at lower luminance you'll know that you have to upgrade the (total)power to the leds.
Just a tip. 
Goodluck!
Underpowering would definitely be an issue for any led and any color. With 4 channel pixels and the option of white colors, regardless of your psu the wrong white selection will always seem off specifically when an opposing color temp is displayed.
This can be slightly negated by tuning white and adding small ammounts of rgb until you get the desired color but keep in mind this can lead to fairly large power draw increases.
Pclin - could you explain how to use your link ? no such experience
SK6812 RGB NW 60LED 1m , psu 30a , ISO7240M
Power 4 point on led strip , rasp power supply directly to the power supply
The strip has 256 leds. If I try to run 256 then the strip not work!. Can only run 255 and lower count.
*** i upload my TV setup + all my settings - let me know if you can't see the pictures
You have to increase the SPI buffer in CMD bootline then you can address more leds than only 255
But be carefull because the Raspi won't boot anymore if the syntax is not put correctly
nothing seems out of the ordinary to me.
The only thing I wonder is why you altered the colours in colourscheme to different than default.
I never did that and only had to change the Gamma settings with ledstrips as WS2801, APA102 and HD107S
In my experience the only colour" that will draw most power thus current from the PSU is shiny 100% brigtness white
Every other colour will draw less current, maybe for separate channel white ledstrips like the NW /CW or WW types that's different.. 🤔
thanks for help. Now all 256 led work fine if anyone has this problem (To change the default add spidev.bufsiz=65536 to /boot/cmdline.txt and reboot)
with white you can't suggest anything else?
and there is another problem. If you change the minor settings in hyperion app all OK , but if i change hardware settings ( SPI device , controller type and etc , the whole system freezes. And help only completely reinstall the software on the sd card ;///
yes I have,
Look up the specs of your SK6812NW strip, mine is running under exactly 5.3 volts ⚡️ (HD107S) to achieve most accurate colours possible. Also better for the Raspi to run at 5.3 volts..
Solder your contact points to reduce resistance
And look at section ledcontroller and choose the correct algorithm for your whites.
Go to youtube video and check ✔️ your colours in live feed and your ledstrip simultaneously, seek for ambilight/govee videos
Set colourscheme in hyperion to default and Gamma on 2.4 red/green/blue
Run the ledstrip at 30% brightness to see if the whites improves with less luminance.. 🤔
That's it for now.
thanks for you help I'm happy with the result
tell me please. Is there a way to add dark colors with good brightness (80-100%) and without losing precision of color.
tell me please. Is there a way to add dark colors with good brightness (80-100%) and without losing precision of color.
look at section capture hardware, if signal detection is on there you can alter treshold values for dark Red Green Blue detection.
(Translation is wrong there... so dont mind that. )
thats something you can do about "dark" colours
colorcalibration look at compensation brightness also.
@Lightning-guy77 ehh , i use piccup and no way for edit capture hardware 
is there a difference in quality between a good capture hardware or a regular piccup soft ? and which way to choose, hdmi hardware or ESP or something else? Thanks
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