Simple fix and was found on this forum if I had looked better...

In Windows XP, click on Start | Control Panel | Accessibility Options |
Display tab | uncheck the "Use high contrast" box | OK.


"Mike_Burns" wrote:

We have created a departmental planner with different colours for each user,
when a user opens up this planner he only sees it in black and white. Other
users can see it in colour no problem at all, is there a setting missing I
need to tick or is there another issue??