The graph line goes black if color_thresholds are set with value out of currently displayed range

[Sindar-sudo]

Hi!
The custom card is great! However, I ran into a slight problem.
If I set color_thresholds with values that are not currently in the range of the visible graph with the default color_thresholds_transition: smooth, the graph does not transition to the specified color, but instead fades to black.
If I set it to color_thresholds_transition: hard or if I set lower/upper_bound, it works as expected, however, using these is not ideal.

Here's my config:

type: 'custom:mini-graph-card'
entities:
  - entity: sensor.temperature
hours_to_show: 24
refresh_interval: 1
color_thresholds:
  - value: 18
    color: blue
  - value: 21
    color: green
  - value: 23
    color: red
color_thresholds_transition: smooth

This is what it looks like:

[Sindar-sudo]

This apparently only works this way with color names (e.g., "red"). When defining colors with hex codes (#FF0000), it works as expected.

[kalkih]

Hello,
Yes, only hex format is officially supported, other format could in some cases.
See #236.