Ray Slakinski wrote:
I still find it hard to read, see new example
The problem here is that there is insufficient value (lightness) contrast between the colors: humans are great at distinguishing color with value contrast, and much worse when there is only contrast in hue or colorfulness. In this case, the scheme overall would benefit from having its colors be lighter: at the moment, they are of middle lightness, which means they don't contrast as well as they could with the black background.
But whatever happens to the text colors, the highlight color here should be darker, because at the moment it is of near identical lightness to the text colors, and they therefore blend right together.