Process your image to threshold background color. Turn the text color to black (for better recognition. once you have threshholded the background it should be fairly simple to change color values.) turn your image into grayscale. Then convert to .tif
format.
Now you might have a chance at processing that image (super user doesn't let me post images so I link them):
Processed Image
Now run the following command:
tesseract test.tif test_output -psm 7
and the result was:
Tist
Which is pretty good given that I have not used any additional training data beside standard eng.
Screenshot of the result