Using circle sensor card - trying to get color to work on non-numeric states

image

type: picture-elements
image: local/pics/Green_Lawn_Pic.jpg
elements:
  - type: custom:circle-sensor-card
    entity: sensor.cold_flu_index_today
    max: 12
    min: 1
    stroke_width: 8
    gradient: true
    fill: '#b4b4b4'
    name: Cold-Flu
    units: ' '
    font_style:
      font-size: 16px
      font-color: white
    color_stops:
      '0': '#55FF55'
      '2.5': '#00b500'
      '4.9': '#ffd900'
      '7.3': '#ff7e00'
      '9.7': '#ff0000'
    style:
      top: 20%
      left: 1%
      width: 100px
      height: 100px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.tomorrow_io_kish_home_grass_pollen_index
    max: very_high
    min: none
    stroke_width: 10
    gradient: true
    fill: '#b4b4b4'
    name: Grass Pollen
    units: '   '
    font_style:
      font-size: 14px
      font-color: white
    color_stops:
      None: '#007300'
      Very_Low: '#00b500'
      Low: '#ffd900'
      Medium: '#ff7e00'
      High: '#ff0000'
      Very_High: '#9B26B6'
    style:
      top: 60%
      left: 27%
      width: 110px
      height: 110px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.tomorrow_io_kish_home_tree_pollen_index
    max: 12
    min: 1
    stroke_width: 10
    gradient: true
    fill: '#b4b4b4'
    name: Tree Pollen
    units: '   '
    font_style:
      font-size: 14px
      font-color: white
    color_stops:
      None: '#007300'
      Very_Low: '#00b500'
      Low: '#ffd900'
      Medium: '#ff7e00'
      High: '#ff0000'
      Very_High: '#9B26B6'
    style:
      top: 60%
      left: 1%
      width: 110px
      height: 110px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.tomorrow_io_kish_home_weed_pollen_index
    max: 12
    min: 1
    stroke_width: 10
    gradient: true
    fill: '#b4b4b4'
    name: Weed Pollen
    units: '   '
    font_style:
      font-size: 14px
      font-color: white
    color_stops:
      none: '#007300'
      very_low: '#00b500'
      low: '#ffd900'
      medium: '#ff7e00'
      high: '#ff0000'
      very_high: '#9B26B6'
    style:
      top: 60%
      left: 53%
      width: 110px
      height: 110px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.tomorrow_io_kish_home_fire_index
    max: 15
    min: 1
    stroke_width: 10
    gradient: true
    fill: '#b4b4b4'
    name: Fire Index
    units: '   '
    font_style:
      font-size: 14px
      font-color: white
    color_stops:
      '0': '#007300'
      '3': '#00b500'
      '6': '#ffd900'
      '9': '#ff7e00'
      '12': '#ff0000'
      '15': '#9B26B6'
    style:
      top: 60%
      left: 79%
      width: 110px
      height: 110px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.allergy_index_today
    max: 12
    min: 1
    stroke_width: 8
    gradient: true
    fill: '#b4b4b4'
    name: Allergy
    units: '   '
    font_style:
      font-size: 16px
      font-color: white
    color_stops:
      '0': '#007300'
      '2.5': '#00b500'
      '4.9': '#ffd900'
      '7.3': '#ff7e00'
      '9.7': '#ff0000'
    style:
      top: 20%
      left: 79%
      width: 100px
      height: 100px
      transform: none
  - type: custom:circle-sensor-card
    entity: sensor.current_ozone_level
    max: 500
    min: 100
    stroke_width: 8
    gradient: true
    fill: '#b4b4b4'
    name: Ozone
    units: '   '
    font_style:
      font-size: 16px
      font-color: white
    color_stops:
      '100': '#ff0000'
      '200': '#ff7e00'
      '300': '#ffd900'
      '400': '#00b500'
      '500': '#007300'
    style:
      top: 20%
      left: 40%
      width: 100px
      height: 100px
      transform: none

Have numbers showing with the color rings, but can’t see to get non-numeric states of entities to color correctly. Need some help understanding what I’m doing wrong or missing.