Custom icon colors outside 0-100 range not working

[GeoffWy]

First off - great card and very useful, but I am having trouble using the card to display LQI over the range 0-250. I am setting color steps as:

colors:
  steps:
    - color: '#ff0000'
      value: 0
    - color: '#aa5500'
      value: 85
    - color: '#55aa00'
      value: 170
    - color: '#00ff00'
      value: 255
  gradient: true

This should set colors ranging from red at 0 to green at 255, but the resulting output sets all values above 100 to the default color. I had understood the fix to this problem was supposed to allocate over the whole range.

Full card code for reference:

type: custom:battery-state-card
title: LQI
secondary_info: '{last_changed}'
icon: mdi:eye
filter:
  include:
    - name: entity_id
      value: sensor.*lqi*
unit: ' '
sort:
  by: state
collapse: 12
bulk_rename:
  - from: LQI
value_override: '{state|equals(unavailable,0)}'
colors:
  steps:
    - color: '#ff0000'
      value: 0
    - color: '#aa5500'
      value: 85
    - color: '#55aa00'
      value: 170
    - color: '#00ff00'
      value: 255
  gradient: true

Originally posted by @maxwroc in #599 (comment)