[Bug]: light card color temperature slider does not show coldest temperatures

Current Behavior

When light has color temperature capability, HA displays the slider going from coldest to warmest temp as a blue to orange gradient. Mushroom card shows the slider going from white to orange.

In your original implementation, the cold temp was correctly shown (and still on the readme example image), but later a PR #48 removed this to set to white as the coldest temp. While I did see there was a technical reason, I do believe this is actually kind of a UI issue.

Couple of reason:

• The most obvious is that by having white as coldest light: you don’t know what color you are setting! Quite a few HA integrations have spent some time aligning the scales so that the white HA is really the white of the light. Using the mushroom card, I cannot exactly see where is the actual white lamp.
• When you bring up the HA more info panel for that light, the scale shows to from blue to orange, so having a white to orange scale in mushroom card is inconsistent and will throw user off balance as it is not expected. (I did thought there was an issue with my setup until I dig through the code of the mushroom card…)
• I would argue that having the light icon to match the color temp slider is less of a priority for good design than having consistent slider scale with HA and being able to set colors properly

Expected Behavior

Having the same color temperature slider as HA in the mushroom card.

Steps To Reproduce

No response

Environment

- OS: 
- Node:
- Version:
- Hassio: 2022.5.4

Anything else?

No response

[bdraco]

if hass.states[entity_id].attributes.color_mode === "color_temp" is true its in color temp mode.

You probably don’t want to adjust the color temp slider based on the brightness value of the light as it will be quite confusing when its all pale grey.

[alessandroias]

I’ve opened an issue into the homeassistant’s repo.