style: make the banner text colored

so it shows on white/black background

src/aare/gui/gui.py

@@ -22,7 +22,7 @@ def main():
         basedir = os.path.dirname(__file__)
         icon_path = os.path.join(basedir, "graphics/aaregui_logo.svg")
         # SVG looks strange on consoles...only show one line
-        banner_path = os.path.join(basedir, "graphics/aare_banner.png")
+        banner_path = os.path.join(basedir, "graphics/aare_banner_blue.png")
     except Exception:
         logger.exception("Failed to load resources for splash screen")
         sys.exit(1)