[FEATURE REQUEST] Bar Chart Background/Track Color

[yatil]

Feature Request

Describe the solution / feature you'd like

When plotting out a bar chart where many values can be zero, it helps glanceability to see where the tracks of the bars would be, it also helps with determining the relative value, especially when using fixed values.

Describe alternatives you've considered

My current alternative is to draw gray lines behind the bar chart. The chart is rendered on top of the drawing, so there is an illusion of having tracks there:

{
  "icon": "863",
  "autoscale": false,
  "draw": [
    { "dl": [ 9, 0,  9, 8, "#333333"] },
    { "dl": [11, 0, 11, 8, "#333333"] },
    { "dl": [13, 0, 13, 8, "#333333"] },
    { "dl": [15, 0, 15, 8, "#333333"] },
    { "dl": [17, 0, 17, 8, "#333333"] },
    { "dl": [19, 0, 19, 8, "#333333"] },
    { "dl": [21, 0, 21, 8, "#333333"] },
    { "dl": [23, 0, 23, 8, "#333333"] },
    { "dl": [25, 0, 25, 8, "#333333"] },
    { "dl": [27, 0, 27, 8, "#333333"] },
    { "dl": [29, 0, 29, 8, "#333333"] }
  ],
  "color": [73, 189, 254],
  "bar": [
    {{ (states('sensor.kmw_forecast_0_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_1_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_2_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_3_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_4_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_5_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_6_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_7_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_8_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_9_prec')  | float) | round(0, "ceil") }},
    {{ (states('sensor.kmw_forecast_10_prec') | float) | round(0, "ceil") }}
  ]
}

And while that is feasible to do with a known number of values, it gets harder otherwise. In addition, choosing the colors wisely and inverting the values for the bars would allow bar charts that are anchored to the top of the display.

Additional context

Here are screenshots without and with “tracks”:

Thanks for your consideration of this Feature Request!