Is it possible to change the text color inside the VSE by changing the source code? I would like to know if it is possible to change the color value of a text strip made in the VSE. 

The default color is white, but what if you have a background which the predominant color is white? 
Is it possible to change the text color via python or changing the source code since there is no option in the user interface?
Meaning a different solution other than to render the text with an alpha background and then change it by color correction and re-render it again.
You can do it directly in the VSE. In the Properties panel, scroll down to Add Strip Modifier, add a Color Balance and change the Gain.