Heatmap color scale is not consistent with legend highlight behavior

[meronz]

Description

When creating a Heatmap chart with color ranges, the elements highlighted not always match the ones colored correctly.
It is not documented if the to/from values for each color in the colorrange is inclusive/exclusive so I assumed that they must be inclusive (the from and to values for each consecutive step must match in order)

Steps to Reproduce

1. Create a heatmap chart, with no shades and a color range (see code pen)
2. Bring the mouse on a legend element. The highlighted elements are wrong

Expected Behavior

On legend mouseover, only the elements in range are highlighted

Actual Behavior

On legend mouseover, the element immediately after is highlighted

Screenshots

Reproduction Link

https://codepen.io/meronz/pen/OJevGQL