The intent to use color to indicate test status is good #83. However, since the status bar color is themable it is almost impossible to come up with colors that work for all themes. See the screenshot below that uses the default dark theme and which hurts the eyes. For this reason we have stopped using a foreground color for text labels in the status bar. Instead we try to use an icon to indicate the state, which you are already doing. My suggestion is to leave the foreground color to white, same as it is done for errors and warnings.
The intent to use color to indicate test status is good #83. However, since the status bar color is themable it is almost impossible to come up with colors that work for all themes. See the screenshot below that uses the default dark theme and which hurts the eyes. For this reason we have stopped using a foreground color for text labels in the status bar. Instead we try to use an icon to indicate the state, which you are already doing. My suggestion is to leave the foreground color to white, same as it is done for errors and warnings.