If you see the Juicebox logo at the bottom right of your gallery, then your gallery is still a Juicebox-Lite gallery. The Juicebox badge/link is displayed in all Lite galleries but not in any Pro galleries. If you create a gallery with JuiceboxBuilder-Pro, then the resulting gallery will be a Pro gallery.

Upgrade your existing gallery to Pro and the logo will be removed. To do this, either:
(1) Open and re-save your gallery (on the 'Publish' tab) in JuiceboxBuilder-Pro.
.. or:
(2) Replace your gallery's 'jbcore' folder with the 'jbcore' folder from the Juicebox-Pro download zip package ('juicebox_pro_1.4.0/web/jbcore/').

First of all, make sure that your online gallery uses the same configuration options as the gallery on your computer.
If you are updating a gallery and are in any doubt as to whether the existing files on your web server are being overwritten, try deleting the gallery from your web server first before uploading the new version in its place. (When deleting anything from your web server, please make a backup copy first, just in case anything goes wrong and you need to reinstate the files.)

Also, check to see if you have any global CSS rules (affecting the font color) on your web page that the gallery may be inheriting. If so, apply these rules only to elements on your web page which require them through use of ids and classes.

If you continue to experience difficulties, please post the URL to your gallery's web page so that I can take a look and help further.