Update only the 'w' value in 'rgbw_color' with slider

Configuration Frontend
1

I can not find way to update only the white value directly in a dashboard.

If you open the info of the light card this popup is displayed:

image
image523×575 75.3 KB

Here you can set the brightness of the color and white separately.

I also want do add the two sliders to a dashboard.
Or is it possible to display the popup permanently in the dashboard instead of the popup?

Here the state of the entity (shelly rgbw 2) in question:

supported_color_modes:
  - rgbw
color_mode: rgbw
brightness: 23
hs_color:
  - 23.059
  - 100
rgb_color:
  - 255
  - 98
  - 0
xy_color:
  - 0.646
  - 0.346
rgbw_color:
  - 255
  - 98
  - 0
  - 0
supported_features: 32
2

use kelvin for white color temperature

action: light.turn_on
data:
  kelvin: 2000
3

Isn’t Kelvin depreciated for action: light.turn_on?

kelvin (Deprecated) Use color_temp_kelvin instead.