Table values are in a range from 0-100%
Only the values need to be colored not the whole cell is it possible ?
In the CSS definition of the font style, you'd set the font color instead of the background color.
See this for some general code of this type. In this example, the css is setting the background colors, which is the usual method - https://answers.splunk.com/answers/217393/how-to-display-colored-cells-or-rows-in-a-dashboar.html
See this one for an example that instead, sets the font color to blue -
Obviously, you'd need to define a font style in your css for the un-highlighted cells and any other highlights you wanted as well.